[{"article_number":"093001","date_published":"2016-08-26T00:00:00Z","_id":"14010","abstract":[{"text":"We report measurements of energy-dependent attosecond photoionization delays between the two outer-most valence shells of N2O and H2O. The combination of single-shot signal referencing with the use of different metal foils to filter the attosecond pulse train enables us to extract delays from congested spectra. Remarkably large delays up to 160 as are observed in N2O, whereas the delays in H2O are all smaller than 50 as in the photon-energy range of 20-40 eV. These results are interpreted by developing a theory of molecular photoionization delays. The long delays measured in N2O are shown to reflect the population of molecular shape resonances that trap the photoelectron for a duration of up to ∼110 as. The unstructured continua of H2O result in much smaller delays at the same photon energies. Our experimental and theoretical methods make the study of molecular attosecond photoionization dynamics accessible.","lang":"eng"}],"arxiv":1,"article_processing_charge":"No","issue":"9","volume":117,"publication_status":"published","main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/1607.07435"}],"oa":1,"article_type":"original","year":"2016","oa_version":"Preprint","scopus_import":"1","external_id":{"arxiv":["1607.07435"],"pmid":["27610849"]},"date_updated":"2023-08-22T08:42:50Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","publication_identifier":{"eissn":["1079-7114"],"issn":["0031-9007"]},"month":"08","extern":"1","date_created":"2023-08-10T06:37:07Z","publication":"Physical Review Letters","quality_controlled":"1","intvolume":" 117","status":"public","publisher":"American Physical Society","day":"26","author":[{"first_name":"Martin","full_name":"Huppert, Martin","last_name":"Huppert"},{"full_name":"Jordan, Inga","first_name":"Inga","last_name":"Jordan"},{"last_name":"Baykusheva","first_name":"Denitsa Rangelova","full_name":"Baykusheva, Denitsa Rangelova","id":"71b4d059-2a03-11ee-914d-dfa3beed6530"},{"last_name":"von Conta","full_name":"von Conta, Aaron","first_name":"Aaron"},{"last_name":"Wörner","first_name":"Hans Jakob","full_name":"Wörner, Hans Jakob"}],"type":"journal_article","citation":{"ista":"Huppert M, Jordan I, Baykusheva DR, von Conta A, Wörner HJ. 2016. Attosecond delays in molecular photoionization. Physical Review Letters. 117(9), 093001.","ieee":"M. Huppert, I. Jordan, D. R. Baykusheva, A. von Conta, and H. J. Wörner, “Attosecond delays in molecular photoionization,” Physical Review Letters, vol. 117, no. 9. American Physical Society, 2016.","chicago":"Huppert, Martin, Inga Jordan, Denitsa Rangelova Baykusheva, Aaron von Conta, and Hans Jakob Wörner. “Attosecond Delays in Molecular Photoionization.” Physical Review Letters. American Physical Society, 2016. https://doi.org/10.1103/physrevlett.117.093001.","mla":"Huppert, Martin, et al. “Attosecond Delays in Molecular Photoionization.” Physical Review Letters, vol. 117, no. 9, 093001, American Physical Society, 2016, doi:10.1103/physrevlett.117.093001.","short":"M. Huppert, I. Jordan, D.R. Baykusheva, A. von Conta, H.J. Wörner, Physical Review Letters 117 (2016).","apa":"Huppert, M., Jordan, I., Baykusheva, D. R., von Conta, A., & Wörner, H. J. (2016). Attosecond delays in molecular photoionization. Physical Review Letters. American Physical Society. https://doi.org/10.1103/physrevlett.117.093001","ama":"Huppert M, Jordan I, Baykusheva DR, von Conta A, Wörner HJ. Attosecond delays in molecular photoionization. Physical Review Letters. 2016;117(9). doi:10.1103/physrevlett.117.093001"},"title":"Attosecond delays in molecular photoionization","keyword":["General Physics and Astronomy"],"language":[{"iso":"eng"}],"doi":"10.1103/physrevlett.117.093001","pmid":1},{"day":"25","type":"journal_article","author":[{"full_name":"Baykusheva, Denitsa Rangelova","first_name":"Denitsa Rangelova","last_name":"Baykusheva","id":"71b4d059-2a03-11ee-914d-dfa3beed6530"},{"full_name":"Ahsan, Md Sabbir","first_name":"Md Sabbir","last_name":"Ahsan"},{"full_name":"Lin, Nan","first_name":"Nan","last_name":"Lin"},{"full_name":"Wörner, Hans Jakob","first_name":"Hans Jakob","last_name":"Wörner"}],"citation":{"mla":"Baykusheva, Denitsa Rangelova, et al. “Bicircular High-Harmonic Spectroscopy Reveals Dynamical Symmetries of Atoms and Molecules.” Physical Review Letters, vol. 116, no. 12, 123001, American Physical Society, 2016, doi:10.1103/physrevlett.116.123001.","ista":"Baykusheva DR, Ahsan MS, Lin N, Wörner HJ. 2016. Bicircular high-harmonic spectroscopy reveals dynamical symmetries of atoms and molecules. Physical Review Letters. 116(12), 123001.","ieee":"D. R. Baykusheva, M. S. Ahsan, N. Lin, and H. J. Wörner, “Bicircular high-harmonic spectroscopy reveals dynamical symmetries of atoms and molecules,” Physical Review Letters, vol. 116, no. 12. American Physical Society, 2016.","chicago":"Baykusheva, Denitsa Rangelova, Md Sabbir Ahsan, Nan Lin, and Hans Jakob Wörner. “Bicircular High-Harmonic Spectroscopy Reveals Dynamical Symmetries of Atoms and Molecules.” Physical Review Letters. American Physical Society, 2016. https://doi.org/10.1103/physrevlett.116.123001.","apa":"Baykusheva, D. R., Ahsan, M. S., Lin, N., & Wörner, H. J. (2016). Bicircular high-harmonic spectroscopy reveals dynamical symmetries of atoms and molecules. Physical Review Letters. American Physical Society. https://doi.org/10.1103/physrevlett.116.123001","ama":"Baykusheva DR, Ahsan MS, Lin N, Wörner HJ. Bicircular high-harmonic spectroscopy reveals dynamical symmetries of atoms and molecules. Physical Review Letters. 2016;116(12). doi:10.1103/physrevlett.116.123001","short":"D.R. Baykusheva, M.S. Ahsan, N. Lin, H.J. Wörner, Physical Review Letters 116 (2016)."},"title":"Bicircular high-harmonic spectroscopy reveals dynamical symmetries of atoms and molecules","keyword":["General Physics and Astronomy"],"language":[{"iso":"eng"}],"doi":"10.1103/physrevlett.116.123001","pmid":1,"month":"03","extern":"1","date_created":"2023-08-10T06:37:16Z","publication":"Physical Review Letters","quality_controlled":"1","intvolume":" 116","status":"public","publisher":"American Physical Society","article_type":"original","oa_version":"None","year":"2016","external_id":{"pmid":["27058077"]},"scopus_import":"1","date_updated":"2023-08-22T08:44:10Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","publication_identifier":{"issn":["0031-9007"],"eissn":["1079-7114"]},"article_number":"123001","abstract":[{"lang":"eng","text":"We introduce bicircular high-harmonic spectroscopy as a new method to probe dynamical symmetries of atoms and molecules and their evolution in time. Our approach is based on combining a circularly polarized femtosecond fundamental field of frequency ω with its counterrotating second harmonic 2ω. We demonstrate the ability of bicircular high-harmonic spectroscopy to characterize the orbital angular momentum symmetry of atomic orbitals. We further show that breaking the threefold rotational symmetry of the generating medium-at the level of either the ensemble or that of a single molecule-results in the emission of the otherwise parity-forbidden frequencies 3qω (q∈N), which provide a background-free probe of dynamical molecular symmetries."}],"_id":"14011","date_published":"2016-03-25T00:00:00Z","article_processing_charge":"No","issue":"12","volume":116,"publication_status":"published"},{"date_created":"2021-11-29T10:01:57Z","extern":"1","month":"12","publisher":"American Institute of Physics","intvolume":" 145","status":"public","quality_controlled":"1","publication":"The Journal of Chemical Physics","title":"Kinetics of spontaneous filament nucleation via oligomers: Insights from theory and simulation","citation":{"mla":"Šarić, Anđela, et al. “Kinetics of Spontaneous Filament Nucleation via Oligomers: Insights from Theory and Simulation.” The Journal of Chemical Physics, vol. 145, no. 21, 211926, American Institute of Physics, 2016, doi:10.1063/1.4965040.","ieee":"A. Šarić, T. C. T. Michaels, A. Zaccone, T. P. J. Knowles, and D. Frenkel, “Kinetics of spontaneous filament nucleation via oligomers: Insights from theory and simulation,” The Journal of Chemical Physics, vol. 145, no. 21. American Institute of Physics, 2016.","ista":"Šarić A, Michaels TCT, Zaccone A, Knowles TPJ, Frenkel D. 2016. Kinetics of spontaneous filament nucleation via oligomers: Insights from theory and simulation. The Journal of Chemical Physics. 145(21), 211926.","chicago":"Šarić, Anđela, Thomas C. T. Michaels, Alessio Zaccone, Tuomas P. J. Knowles, and Daan Frenkel. “Kinetics of Spontaneous Filament Nucleation via Oligomers: Insights from Theory and Simulation.” The Journal of Chemical Physics. American Institute of Physics, 2016. https://doi.org/10.1063/1.4965040.","apa":"Šarić, A., Michaels, T. C. T., Zaccone, A., Knowles, T. P. J., & Frenkel, D. (2016). Kinetics of spontaneous filament nucleation via oligomers: Insights from theory and simulation. The Journal of Chemical Physics. American Institute of Physics. https://doi.org/10.1063/1.4965040","ama":"Šarić A, Michaels TCT, Zaccone A, Knowles TPJ, Frenkel D. Kinetics of spontaneous filament nucleation via oligomers: Insights from theory and simulation. The Journal of Chemical Physics. 2016;145(21). doi:10.1063/1.4965040","short":"A. Šarić, T.C.T. Michaels, A. Zaccone, T.P.J. Knowles, D. Frenkel, The Journal of Chemical Physics 145 (2016)."},"author":[{"first_name":"Anđela","full_name":"Šarić, Anđela","last_name":"Šarić","id":"bf63d406-f056-11eb-b41d-f263a6566d8b","orcid":"0000-0002-7854-2139"},{"last_name":"Michaels","first_name":"Thomas C. T.","full_name":"Michaels, Thomas C. T."},{"last_name":"Zaccone","full_name":"Zaccone, Alessio","first_name":"Alessio"},{"first_name":"Tuomas P. J.","full_name":"Knowles, Tuomas P. J.","last_name":"Knowles"},{"last_name":"Frenkel","full_name":"Frenkel, Daan","first_name":"Daan"}],"type":"journal_article","day":"01","acknowledgement":"We acknowledge support from the Human Frontier Science Program and Emmanuel College (A.Š.), St John’s and Peterhouse Colleges (T.C.T.M.), the Swiss National Science Foundation (T.C.T.M.), the Biotechnology and Biological Sciences Research Council (T.P.J.K.), the Frances and Augustus Newman Foundation (T.P.J.K.), the European Research Council (T.C.T.M., T.P.J.K., and D.F.), and the Engineering and Physical Sciences Research Council (D.F.).","pmid":1,"doi":"10.1063/1.4965040","language":[{"iso":"eng"}],"keyword":["physical and theoretical chemistry","general physics and astronomy"],"issue":"21","article_processing_charge":"No","arxiv":1,"_id":"10376","abstract":[{"text":"Nucleation processes are at the heart of a large number of phenomena, from cloud formation to protein crystallization. A recently emerging area where nucleation is highly relevant is the initiation of filamentous protein self-assembly, a process that has broad implications in many research areas ranging from medicine to nanotechnology. As such, spontaneous nucleation of protein fibrils has received much attention in recent years with many theoretical and experimental studies focusing on the underlying physical principles. In this paper we make a step forward in this direction and explore the early time behaviour of filamentous protein growth in the context of nucleation theory. We first provide an overview of the thermodynamics and kinetics of spontaneous nucleation of protein filaments in the presence of one relevant degree of freedom, namely the cluster size. In this case, we review how key kinetic observables, such as the reaction order of spontaneous nucleation, are directly related to the physical size of the critical nucleus. We then focus on the increasingly prominent case of filament nucleation that includes a conformational conversion of the nucleating building-block as an additional slow step in the nucleation process. Using computer simulations, we study the concentration dependence of the nucleation rate. We find that, under these circumstances, the reaction order of spontaneous nucleation with respect to the free monomer does no longer relate to the overall physical size of the nucleating aggregate but rather to the portion of the aggregate that actively participates in the conformational conversion. Our results thus provide a novel interpretation of the common kinetic descriptors of protein filament formation, including the reaction order of the nucleation step or the scaling exponent of lag times, and put into perspective current theoretical descriptions of protein aggregation.","lang":"eng"}],"date_published":"2016-12-01T00:00:00Z","article_number":"211926","oa":1,"main_file_link":[{"url":"https://arxiv.org/abs/1610.02320","open_access":"1"}],"publication_status":"published","volume":145,"year":"2016","oa_version":"Preprint","article_type":"original","publication_identifier":{"issn":["0021-9606"],"eissn":["1089-7690"]},"user_id":"8b945eb4-e2f2-11eb-945a-df72226e66a9","date_updated":"2021-11-29T10:33:11Z","scopus_import":"1","external_id":{"pmid":["28799382"],"arxiv":["1610.02320"]}},{"publication_status":"published","oa":1,"main_file_link":[{"url":"https://discovery.ucl.ac.uk/id/eprint/1517406/","open_access":"1"}],"volume":12,"issue":"9","article_processing_charge":"No","_id":"10378","abstract":[{"lang":"eng","text":"The ability of biological molecules to replicate themselves is the foundation of life, requiring a complex cellular machinery. However, a range of aberrant processes involve the self-replication of pathological protein structures without any additional assistance. One example is the autocatalytic generation of pathological protein aggregates, including amyloid fibrils, involved in neurodegenerative disorders. Here, we use computer simulations to identify the necessary requirements for the self-replication of fibrillar assemblies of proteins. We establish that a key physical determinant for this process is the affinity of proteins for the surfaces of fibrils. We find that self-replication can take place only in a very narrow regime of inter-protein interactions, implying a high level of sensitivity to system parameters and experimental conditions. We then compare our theoretical predictions with kinetic and biosensor measurements of fibrils formed from the Aβ peptide associated with Alzheimer’s disease. Our results show a quantitative connection between the kinetics of self-replication and the surface coverage of fibrils by monomeric proteins. These findings reveal the fundamental physical requirements for the formation of supra-molecular structures able to replicate themselves, and shed light on mechanisms in play in the proliferation of protein aggregates in nature."}],"date_published":"2016-07-18T00:00:00Z","date_updated":"2021-11-29T11:07:25Z","user_id":"8b945eb4-e2f2-11eb-945a-df72226e66a9","scopus_import":"1","external_id":{"pmid":["31031819"]},"publication_identifier":{"eissn":["1745-2481"],"issn":["1745-2473"]},"article_type":"original","year":"2016","oa_version":"Preprint","publisher":"Springer Nature","quality_controlled":"1","publication":"Nature Physics","status":"public","intvolume":" 12","page":"874-880","extern":"1","month":"07","date_created":"2021-11-29T10:36:11Z","acknowledgement":"We acknowledge support from the Human Frontier Science Program and Emmanuel College (A.Š.), the Leverhulme Trust and Magdalene College (A.K.B.), St John’s College (T.C.T.M.), the Biotechnology and Biological Sciences Research Council (T.P.J.K. and C.M.D.), the Frances and Augustus Newman Foundation (T.P.J.K.), the European Research Council (T.P.J.K., T.C.T.M., S.L. and D.F.), and the Engineering and Physical Sciences Research Council (D.F.).","pmid":1,"language":[{"iso":"eng"}],"keyword":["general physics and astronomy"],"doi":"10.1038/nphys3828","citation":{"mla":"Šarić, Anđela, et al. “Physical Determinants of the Self-Replication of Protein Fibrils.” Nature Physics, vol. 12, no. 9, Springer Nature, 2016, pp. 874–80, doi:10.1038/nphys3828.","ista":"Šarić A, Buell AK, Meisl G, Michaels TCT, Dobson CM, Linse S, Knowles TPJ, Frenkel D. 2016. Physical determinants of the self-replication of protein fibrils. Nature Physics. 12(9), 874–880.","ieee":"A. Šarić et al., “Physical determinants of the self-replication of protein fibrils,” Nature Physics, vol. 12, no. 9. Springer Nature, pp. 874–880, 2016.","chicago":"Šarić, Anđela, Alexander K. Buell, Georg Meisl, Thomas C. T. Michaels, Christopher M. Dobson, Sara Linse, Tuomas P. J. Knowles, and Daan Frenkel. “Physical Determinants of the Self-Replication of Protein Fibrils.” Nature Physics. Springer Nature, 2016. https://doi.org/10.1038/nphys3828.","apa":"Šarić, A., Buell, A. K., Meisl, G., Michaels, T. C. T., Dobson, C. M., Linse, S., … Frenkel, D. (2016). Physical determinants of the self-replication of protein fibrils. Nature Physics. Springer Nature. https://doi.org/10.1038/nphys3828","ama":"Šarić A, Buell AK, Meisl G, et al. Physical determinants of the self-replication of protein fibrils. Nature Physics. 2016;12(9):874-880. doi:10.1038/nphys3828","short":"A. Šarić, A.K. Buell, G. Meisl, T.C.T. Michaels, C.M. Dobson, S. Linse, T.P.J. Knowles, D. Frenkel, Nature Physics 12 (2016) 874–880."},"title":"Physical determinants of the self-replication of protein fibrils","day":"18","author":[{"first_name":"Anđela","full_name":"Šarić, Anđela","last_name":"Šarić","id":"bf63d406-f056-11eb-b41d-f263a6566d8b","orcid":"0000-0002-7854-2139"},{"first_name":"Alexander K.","full_name":"Buell, Alexander K.","last_name":"Buell"},{"last_name":"Meisl","first_name":"Georg","full_name":"Meisl, Georg"},{"last_name":"Michaels","full_name":"Michaels, Thomas C. T.","first_name":"Thomas C. T."},{"last_name":"Dobson","full_name":"Dobson, Christopher M.","first_name":"Christopher M."},{"first_name":"Sara","full_name":"Linse, Sara","last_name":"Linse"},{"first_name":"Tuomas P. J.","full_name":"Knowles, Tuomas P. J.","last_name":"Knowles"},{"last_name":"Frenkel","first_name":"Daan","full_name":"Frenkel, Daan"}],"type":"journal_article"},{"main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/1602.02734"}],"oa":1,"publication_status":"published","volume":144,"article_processing_charge":"No","issue":"22","arxiv":1,"_id":"10380","abstract":[{"lang":"eng","text":"Using non-equilibrium molecular dynamics simulations, it has been recently demonstrated that water molecules align in response to an imposed temperature gradient, resulting in an effective electric field. Here, we investigate how thermally induced fields depend on the underlying treatment of long-ranged interactions. For the short-ranged Wolf method and Ewald summation, we find the peak strength of the field to range between 2 × 107 and 5 × 107 V/m for a temperature gradient of 5.2 K/Å. Our value for the Wolf method is therefore an order of magnitude lower than the literature value [J. A. Armstrong and F. Bresme, J. Chem. Phys. 139, 014504 (2013); J. Armstrong et al., J. Chem. Phys. 143, 036101 (2015)]. We show that this discrepancy can be traced back to the use of an incorrect kernel in the calculation of the electrostatic field. More seriously, we find that the Wolf method fails to predict correct molecular orientations, resulting in dipole densities with opposite sign to those computed using Ewald summation. By considering two different multipole expansions, we show that, for inhomogeneous polarisations, the quadrupole contribution can be significant and even outweigh the dipole contribution to the field. Finally, we propose a more accurate way of calculating the electrostatic potential and the field. In particular, we show that averaging the microscopic field analytically to obtain the macroscopic Maxwell field reduces the error bars by up to an order of magnitude. As a consequence, the simulation times required to reach a given statistical accuracy decrease by up to two orders of magnitude."}],"date_published":"2016-06-10T00:00:00Z","article_number":"224102","publication_identifier":{"eissn":["1089-7690"],"issn":["0021-9606"]},"scopus_import":"1","external_id":{"pmid":["27305991"],"arxiv":["1602.02734"]},"user_id":"8b945eb4-e2f2-11eb-945a-df72226e66a9","date_updated":"2021-11-29T13:09:08Z","year":"2016","oa_version":"Preprint","article_type":"original","publisher":"American Institute of Physics","intvolume":" 144","status":"public","publication":"The Journal of Chemical Physics","quality_controlled":"1","date_created":"2021-11-29T11:08:52Z","month":"06","extern":"1","pmid":1,"acknowledgement":"The authors should like to dedicate this paper to the memory of Simon de Leeuw, who was a pioneer in the calculation of Coulomb effects in simulations. P.W. would like to thank the Austrian Academy of Sciences for financial support through a DOC Fellowship, and for covering the travel expenses for the CECAM workshop in Zaragoza in May 2015, where these results were first presented. P.W. would also like to thank Chao Zhang for pointing out the equivalence of the two expressions for the electric field discussed in Sec. VI D, Michiel Sprik for emphasising the importance of the quadrupole contribution in experimental studies of interfacial systems, as well as Aleks Reinhardt and other members of the Frenkel and Dellago groups for their advice. We further acknowledge support from the Federation of Austrian Industry (IV) Carinthia (P.W.), the University of Zagreb and Erasmus SMP (D. Fijan), the Human Frontier Science Program and Emmanuel College (A.Š.), the Austrian Science Fund FWF within the SFB Vicom project F41 (C.D.), and the Engineering and Physical Sciences Research Council Programme Grant No. EP/I001352/1 (D.F.). Additional data related to this publication are available at the University of Cambridge data repository (http://dx.doi.org/10.17863/CAM.118).","doi":"10.1063/1.4953036","keyword":["physical and theoretical chemistry","general physics and astronomy"],"language":[{"iso":"eng"}],"title":"Non-equilibrium simulations of thermally induced electric fields in water","citation":{"ama":"Wirnsberger P, Fijan D, Šarić A, Neumann M, Dellago C, Frenkel D. Non-equilibrium simulations of thermally induced electric fields in water. The Journal of Chemical Physics. 2016;144(22). doi:10.1063/1.4953036","apa":"Wirnsberger, P., Fijan, D., Šarić, A., Neumann, M., Dellago, C., & Frenkel, D. (2016). Non-equilibrium simulations of thermally induced electric fields in water. The Journal of Chemical Physics. American Institute of Physics. https://doi.org/10.1063/1.4953036","short":"P. Wirnsberger, D. Fijan, A. Šarić, M. Neumann, C. Dellago, D. Frenkel, The Journal of Chemical Physics 144 (2016).","mla":"Wirnsberger, P., et al. “Non-Equilibrium Simulations of Thermally Induced Electric Fields in Water.” The Journal of Chemical Physics, vol. 144, no. 22, 224102, American Institute of Physics, 2016, doi:10.1063/1.4953036.","chicago":"Wirnsberger, P., D. Fijan, Anđela Šarić, M. Neumann, C. Dellago, and D. Frenkel. “Non-Equilibrium Simulations of Thermally Induced Electric Fields in Water.” The Journal of Chemical Physics. American Institute of Physics, 2016. https://doi.org/10.1063/1.4953036.","ista":"Wirnsberger P, Fijan D, Šarić A, Neumann M, Dellago C, Frenkel D. 2016. Non-equilibrium simulations of thermally induced electric fields in water. The Journal of Chemical Physics. 144(22), 224102.","ieee":"P. Wirnsberger, D. Fijan, A. Šarić, M. Neumann, C. Dellago, and D. Frenkel, “Non-equilibrium simulations of thermally induced electric fields in water,” The Journal of Chemical Physics, vol. 144, no. 22. American Institute of Physics, 2016."},"type":"journal_article","author":[{"last_name":"Wirnsberger","full_name":"Wirnsberger, P.","first_name":"P."},{"last_name":"Fijan","full_name":"Fijan, D.","first_name":"D."},{"last_name":"Šarić","full_name":"Šarić, Anđela","first_name":"Anđela","id":"bf63d406-f056-11eb-b41d-f263a6566d8b","orcid":"0000-0002-7854-2139"},{"full_name":"Neumann, M.","first_name":"M.","last_name":"Neumann"},{"last_name":"Dellago","first_name":"C.","full_name":"Dellago, C."},{"full_name":"Frenkel, D.","first_name":"D.","last_name":"Frenkel"}],"day":"10"},{"day":"28","type":"journal_article","author":[{"last_name":"Sobral","first_name":"David","full_name":"Sobral, David"},{"id":"7439a258-f3c0-11ec-9501-9df22fe06720","orcid":"0000-0003-2871-127X","last_name":"Matthee","full_name":"Matthee, Jorryt J","first_name":"Jorryt J"},{"last_name":"Darvish","full_name":"Darvish, Behnam","first_name":"Behnam"},{"last_name":"Schaerer","full_name":"Schaerer, Daniel","first_name":"Daniel"},{"last_name":"Mobasher","first_name":"Bahram","full_name":"Mobasher, Bahram"},{"full_name":"Röttgering, Huub","first_name":"Huub","last_name":"Röttgering"},{"last_name":"Santos","first_name":"Sérgio","full_name":"Santos, Sérgio"},{"last_name":"Hemmati","full_name":"Hemmati, Shoubaneh","first_name":"Shoubaneh"}],"citation":{"mla":"Sobral, David, et al. “Evidence for PopIII-like Stellar Populations in the Most Luminous Lyα Emitters at the Epoch of Reionisation: Spectroscopic Confirmation.” The Astrophysical Journal, vol. 808, no. 2, IOP Publishing, 2015, p. 139, doi:10.1088/0004-637X/808/2/139.","chicago":"Sobral, David, Jorryt J Matthee, Behnam Darvish, Daniel Schaerer, Bahram Mobasher, Huub Röttgering, Sérgio Santos, and Shoubaneh Hemmati. “Evidence for PopIII-like Stellar Populations in the Most Luminous Lyα Emitters at the Epoch of Reionisation: Spectroscopic Confirmation.” The Astrophysical Journal. IOP Publishing, 2015. https://doi.org/10.1088/0004-637X/808/2/139.","ieee":"D. Sobral et al., “Evidence for PopIII-like stellar populations in the most luminous Lyα emitters at the epoch of reionisation: Spectroscopic confirmation,” The Astrophysical Journal, vol. 808, no. 2. IOP Publishing, p. 139, 2015.","ista":"Sobral D, Matthee JJ, Darvish B, Schaerer D, Mobasher B, Röttgering H, Santos S, Hemmati S. 2015. Evidence for PopIII-like stellar populations in the most luminous Lyα emitters at the epoch of reionisation: Spectroscopic confirmation. The Astrophysical Journal. 808(2), 139.","ama":"Sobral D, Matthee JJ, Darvish B, et al. Evidence for PopIII-like stellar populations in the most luminous Lyα emitters at the epoch of reionisation: Spectroscopic confirmation. The Astrophysical Journal. 2015;808(2):139. doi:10.1088/0004-637X/808/2/139","apa":"Sobral, D., Matthee, J. J., Darvish, B., Schaerer, D., Mobasher, B., Röttgering, H., … Hemmati, S. (2015). Evidence for PopIII-like stellar populations in the most luminous Lyα emitters at the epoch of reionisation: Spectroscopic confirmation. The Astrophysical Journal. IOP Publishing. https://doi.org/10.1088/0004-637X/808/2/139","short":"D. Sobral, J.J. Matthee, B. Darvish, D. Schaerer, B. Mobasher, H. Röttgering, S. Santos, S. Hemmati, The Astrophysical Journal 808 (2015) 139."},"title":"Evidence for PopIII-like stellar populations in the most luminous Lyα emitters at the epoch of reionisation: Spectroscopic confirmation","language":[{"iso":"eng"}],"keyword":["Space and Planetary Science","Astronomy and Astrophysics","dark ages","reionization","first stars – early universe – galaxies: evolution"],"doi":"10.1088/0004-637X/808/2/139","acknowledgement":"We thank the anonymous reviewer for useful and constructive comments and suggestions which greatly improved the quality and clarity of our work. D.S. acknowledges financial support from the Netherlands Organisation for Scientific research (NWO) through a Veni fellowship, from FCT through a FCT Investigator Starting Grant and Start-up Grant (IF/01154/2012/CP0189/CT0010), from FCT grant UID/FIS/04434/2013, and from LSF and LKBF. J.M. acknowledges the award of a Huygens PhD fellowship. H.R. acknowledges support from the ERC Advanced Investigator program NewClusters 321271. The authors thank Mark Dijkstra, Bhaskar Agarwal, Jarrett Johnson, Andrea Ferrara, Jarle Brinchmann, Rebecca Bowler, George Becker, Emma Curtis-Lake, Milos Milosavljevic, Raffaella Schneider, Paul Shapiro, and Erik Zackrisson for interesting, stimulating and helpful discussions. The authors are extremely grateful to ESO for the award of ESO DDT time (294.A-5018 and 294.A-5039) which allowed the spectroscopic confirmation of both sources and the detailed investigation of their nature. Observations are also based on data from W.M. Keck Observatory. The W.M. Keck Observatory is operated as a scientific partnership of Caltech, the University of California and the National Aeronautics and Space Administration. Based on observations obtained with MegaPrime/Megacam, a joint project of CFHT and CEA/IRFU, at the Canada–France–Hawaii Telescope (CFHT) which is operated by the National Research Council (NRC) of Canada, the Institut National des Science de lUnivers of the Centre National de la Recherche Scientifique (CNRS) of France, and the University of Hawaii. This work is based in part on data products produced at Terapix available at the Canadian Astronomy Data Centre as part of the Canada–France–Hawaii Telescope Legacy Survey, a collaborative project of NRC and CNRS. Based on data products from observations made with ESO Telescopes at the La Silla Paranal Observatory under ESO programme IDs 294.A-5018, 294.A-5039, and 179.A-2005, and on data products produced by TERAPIX and the Cambridge Astronomy Survey Unit on behalf of the UltraVISTA consortium. The authors acknowledge the award of service time (SW2014b20) on the William Herschel Telescope (WHT). WHT and its service programme are operated on the island of La Palma by the Isaac Newton Group in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias.","extern":"1","month":"07","date_created":"2022-07-07T09:00:58Z","page":"139","quality_controlled":"1","publication":"The Astrophysical Journal","intvolume":" 808","status":"public","publisher":"IOP Publishing","article_type":"original","oa_version":"Preprint","year":"2015","date_updated":"2022-08-18T10:30:13Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","scopus_import":"1","external_id":{"arxiv":["1504.01734"]},"publication_identifier":{"issn":["0004-637X"],"eissn":["1538-4357"]},"_id":"11519","date_published":"2015-07-28T00:00:00Z","abstract":[{"text":"Faint Lyα emitters become increasingly rarer toward the reionization epoch (z ∼ 6–7). However, observations from a very large (∼5 deg2) Lyα narrow-band survey at z = 6.6 show that this is not the case for the most luminous emitters, capable of ionizing their own local bubbles. Here we present follow-up observations of the two most luminous Lyα candidates in the COSMOS field: “MASOSA” and “CR7.” We used X-SHOOTER, SINFONI, and FORS2 on the Very Large Telescope, and DEIMOS on Keck, to confirm both candidates beyond any doubt. We find redshifts of z = 6.541 and z = 6.604 for “MASOSA” and “CR7,” respectively. MASOSA has a strong detection in Lyα with a line width of 386 ± 30 km s−1 (FWHM) and with very high EW0 (>200 Å), but undetected in the continuum, implying very low stellar mass and a likely young, metal-poor stellar population. “CR7,” with an observed Lyα luminosity of 1043.92±0.05 erg s−1 is the most luminous Lyα emitter ever found at z > 6 and is spatially extended (∼16 kpc). “CR7” reveals a narrow Lyα line with 266 ± 15 km s−1 FWHM, being detected in the near-infrared (NIR) (rest-frame UV; β = −2.3 ± 0.1) and in IRAC/Spitzer. We detect a narrow He II 1640 Å emission line (6σ, FWHM = 130 ± 30 km s−1 ) in CR7 which can explain the clear excess seen in the J-band photometry (EW0 ∼ 80 Å). We find no other emission lines from the UV to the NIR in our X-SHOOTER spectra (He II/O III] 1663 Å > 3 and He II/C III] 1908 Å > 2.5). We conclude that CR7 is best explained by a combination of a PopIII-like population, which dominates the rest-frame UV and the nebular emission, and a more normal stellar population, which presumably dominates the mass. Hubble Space Telescope/WFC3 observations show that the light is indeed spatially separated between a very blue component, coincident with Lyα and He II emission, and two red components (∼5 kpc away), which dominate the mass. Our findings are consistent with theoretical predictions of a PopIII wave, with PopIII star formation migrating away from the original sites of star formation.","lang":"eng"}],"arxiv":1,"issue":"2","article_processing_charge":"No","volume":808,"publication_status":"published","oa":1,"main_file_link":[{"url":"https://arxiv.org/abs/1504.01734","open_access":"1"}]},{"title":"The brightest Lyα emitter: Pop III or black hole?","citation":{"mla":"Pallottini, A., et al. “The Brightest Lyα Emitter: Pop III or Black Hole?” Monthly Notices of the Royal Astronomical Society, vol. 453, no. 3, Oxford University Press, 2015, pp. 2465–70, doi:10.1093/mnras/stv1795.","chicago":"Pallottini, A., A. Ferrara, F. Pacucci, S. Gallerani, S. Salvadori, R. Schneider, D. Schaerer, D. Sobral, and Jorryt J Matthee. “The Brightest Lyα Emitter: Pop III or Black Hole?” Monthly Notices of the Royal Astronomical Society. Oxford University Press, 2015. https://doi.org/10.1093/mnras/stv1795.","ista":"Pallottini A, Ferrara A, Pacucci F, Gallerani S, Salvadori S, Schneider R, Schaerer D, Sobral D, Matthee JJ. 2015. The brightest Lyα emitter: Pop III or black hole? Monthly Notices of the Royal Astronomical Society. 453(3), 2465–2470.","ieee":"A. Pallottini et al., “The brightest Lyα emitter: Pop III or black hole?,” Monthly Notices of the Royal Astronomical Society, vol. 453, no. 3. Oxford University Press, pp. 2465–2470, 2015.","ama":"Pallottini A, Ferrara A, Pacucci F, et al. The brightest Lyα emitter: Pop III or black hole? Monthly Notices of the Royal Astronomical Society. 2015;453(3):2465-2470. doi:10.1093/mnras/stv1795","apa":"Pallottini, A., Ferrara, A., Pacucci, F., Gallerani, S., Salvadori, S., Schneider, R., … Matthee, J. J. (2015). The brightest Lyα emitter: Pop III or black hole? Monthly Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/stv1795","short":"A. Pallottini, A. Ferrara, F. Pacucci, S. Gallerani, S. Salvadori, R. Schneider, D. Schaerer, D. Sobral, J.J. Matthee, Monthly Notices of the Royal Astronomical Society 453 (2015) 2465–2470."},"type":"journal_article","author":[{"last_name":"Pallottini","full_name":"Pallottini, A.","first_name":"A."},{"first_name":"A.","full_name":"Ferrara, A.","last_name":"Ferrara"},{"first_name":"F.","full_name":"Pacucci, F.","last_name":"Pacucci"},{"last_name":"Gallerani","first_name":"S.","full_name":"Gallerani, S."},{"first_name":"S.","full_name":"Salvadori, S.","last_name":"Salvadori"},{"last_name":"Schneider","first_name":"R.","full_name":"Schneider, R."},{"last_name":"Schaerer","first_name":"D.","full_name":"Schaerer, D."},{"full_name":"Sobral, D.","first_name":"D.","last_name":"Sobral"},{"orcid":"0000-0003-2871-127X","id":"7439a258-f3c0-11ec-9501-9df22fe06720","last_name":"Matthee","first_name":"Jorryt J","full_name":"Matthee, Jorryt J"}],"day":"01","acknowledgement":"SS acknowledges support from the Netherlands Organization for Scientific research (NWO), VENI grant 639.041.233. RS acknowledges support from the European Research Council under the European Union (FP/2007-2013)/ERC grant agreement no. 306476. DS acknowledges (i) financial support from the NWO through a Veni fellowship and (ii) funding from FCT through a FCT Investigator Starting Grant and Start-up Grant (IF/01154/2012/CP0189/CT0010) and from FCT grant PEstOE/FIS/UI2751/2014.","doi":"10.1093/mnras/stv1795","keyword":["Space and Planetary Science","Astronomy and Astrophysics","black hole physics","stars: Population III","galaxies: high-redshift"],"language":[{"iso":"eng"}],"page":"2465-2470","date_created":"2022-07-14T08:58:36Z","month":"11","extern":"1","publisher":"Oxford University Press","status":"public","intvolume":" 453","publication":"Monthly Notices of the Royal Astronomical Society","quality_controlled":"1","year":"2015","oa_version":"Preprint","article_type":"original","publication_identifier":{"eissn":["1365-2966"],"issn":["0035-8711"]},"scopus_import":"1","external_id":{"arxiv":["1506.07173"]},"date_updated":"2022-08-19T08:19:23Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","article_processing_charge":"No","issue":"3","arxiv":1,"_id":"11579","date_published":"2015-11-01T00:00:00Z","abstract":[{"lang":"eng","text":"CR7 is the brightest z = 6.6 Ly α emitter (LAE) known to date, and spectroscopic follow-up by Sobral et al. suggests that CR7 might host Population (Pop) III stars. We examine this interpretation using cosmological hydrodynamical simulations. Several simulated galaxies show the same ‘Pop III wave’ pattern observed in CR7. However, to reproduce the extreme CR7 Ly α/He II1640 line luminosities (Lα/HeII) a top-heavy initial mass function and a massive ( ≳ 107 M⊙) Pop III burst with age ≲ 2 Myr are required. Assuming that the observed properties of Ly α and He II emission are typical for Pop III, we predict that in the COSMOS/UDS/SA22 fields, 14 out of the 30 LAEs at z = 6.6 with Lα > 1043.3 erg s−1 should also host Pop III stars producing an observable LHeII≳1042.7ergs−1. As an alternate explanation, we explore the possibility that CR7 is instead powered by accretion on to a direct collapse black hole. Our model predicts Lα, LHeII, and X-ray luminosities that are in agreement with the observations. In any case, the observed properties of CR7 indicate that this galaxy is most likely powered by sources formed from pristine gas. We propose that further X-ray observations can distinguish between the two above scenarios."}],"oa":1,"main_file_link":[{"url":"https://arxiv.org/abs/1506.07173","open_access":"1"}],"publication_status":"published","volume":453},{"publisher":"Oxford University Press","intvolume":" 451","status":"public","publication":"Monthly Notices of the Royal Astronomical Society","quality_controlled":"1","page":"2303-2323","date_created":"2022-07-14T09:02:22Z","month":"08","extern":"1","acknowledgement":"The authors wish to thank the anonymous reviewer for many helpful comments and suggestions which greatly improved the clarity and quality of this work. DS acknowledges financial support from the Netherlands Organization for Scientific research (NWO) through a Veni fellowship, from FCT through an FCT Investigator Starting Grant and Start-up Grant (IF/01154/2012/CP0189/CT0010), from FCT grant PEst-OE/FIS/UI2751/2014, and from LSF and LKBF. JM acknowledges the award of a Huygens PhD fellowship. PNB is grateful for support from STFC. IRS acknowledges support from STFC, a Leverhulme Fellowship, the ERC Advanced Investigator programme DUSTYGAL and a Royal Society/Wolfson Merit Award. BMJ acknowledges support from the ERC-StG grant EGGS-278202. The Dark Cosmology Centre is funded by the DNRF. The Dark Cosmology Centre is funded by the DNRF. JWK acknowledges support from the National Research Foundation of Korea (NRF) grant, no. 2008-0060544, funded by the Korea government (MSIP). JPS acknowledges support from STFC (ST/I001573/1). JC acknowledges support from the FCT-IF grant IF/01154/2012/CP0189/CT0010. The work was only possible due to OPTICON/FP7 and the invaluable access that it granted to the CFHT telescope. We would also like to acknowledge the excellent work done by CFHT staff in conducting the observations in service mode, and on delivering truly excellent data. We are also tremendously thankful to Kentaro Aoki for the incredible support while observing at Subaru with FMOS, and also to the Keck staff for the help with the observations with MOSFIRE. This work is based on observations obtained with WIRCam on the CFHT, OPTICON programme 2011B/029, 2012A019 and 2012B/016. Based on observations made with ESO telescopes at the La Silla Paranal Observatory under programmes IDs 60.A-9460 (data can be accessed through the ESO data archive), 087.A 0337 and 089.A-0965. Based on observations done with FMOS on Subaru under programme S14A-084, and on MOSFIRE/Keck observations under programme U066M. Part of the data on which this analysis is based are available from Sobral et al. (2013a). Dedicated to the memory of C. M. Sobral (1953-2014).","doi":"10.1093/mnras/stv1076","keyword":["Space and Planetary Science","Astronomy and Astrophysics","galaxies: evolution","galaxies: formation","galaxies: luminosity function","mass function","cosmology: observations","early Universe","large-scale structure of Universe"],"language":[{"iso":"eng"}],"title":"CF-HiZELS, an ∼10 deg2 emission-line survey with spectroscopic follow-up: Hα, [O III] + Hβ and [O II] luminosity functions at z = 0.8, 1.4 and 2.2 ","citation":{"ieee":"D. Sobral et al., “CF-HiZELS, an ∼10 deg2 emission-line survey with spectroscopic follow-up: Hα, [O III] + Hβ and [O II] luminosity functions at z = 0.8, 1.4 and 2.2 ,” Monthly Notices of the Royal Astronomical Society, vol. 451, no. 3. Oxford University Press, pp. 2303–2323, 2015.","ista":"Sobral D, Matthee JJ, Best PN, Smail I, Khostovan AA, Milvang-Jensen B, Kim J-W, Stott J, Calhau J, Nayyeri H, Mobasher B. 2015. CF-HiZELS, an ∼10 deg2 emission-line survey with spectroscopic follow-up: Hα, [O III] + Hβ and [O II] luminosity functions at z = 0.8, 1.4 and 2.2 . Monthly Notices of the Royal Astronomical Society. 451(3), 2303–2323.","chicago":"Sobral, D., Jorryt J Matthee, P. N. Best, I. Smail, A. A. Khostovan, B. Milvang-Jensen, J.-W. Kim, et al. “CF-HiZELS, an ∼10 Deg2 Emission-Line Survey with Spectroscopic Follow-up: Hα, [O III] + Hβ and [O II] Luminosity Functions at z = 0.8, 1.4 and 2.2 .” Monthly Notices of the Royal Astronomical Society. Oxford University Press, 2015. https://doi.org/10.1093/mnras/stv1076.","mla":"Sobral, D., et al. “CF-HiZELS, an ∼10 Deg2 Emission-Line Survey with Spectroscopic Follow-up: Hα, [O III] + Hβ and [O II] Luminosity Functions at z = 0.8, 1.4 and 2.2 .” Monthly Notices of the Royal Astronomical Society, vol. 451, no. 3, Oxford University Press, 2015, pp. 2303–23, doi:10.1093/mnras/stv1076.","short":"D. Sobral, J.J. Matthee, P.N. Best, I. Smail, A.A. Khostovan, B. Milvang-Jensen, J.-W. Kim, J. Stott, J. Calhau, H. Nayyeri, B. Mobasher, Monthly Notices of the Royal Astronomical Society 451 (2015) 2303–2323.","apa":"Sobral, D., Matthee, J. J., Best, P. N., Smail, I., Khostovan, A. A., Milvang-Jensen, B., … Mobasher, B. (2015). CF-HiZELS, an ∼10 deg2 emission-line survey with spectroscopic follow-up: Hα, [O III] + Hβ and [O II] luminosity functions at z = 0.8, 1.4 and 2.2 . Monthly Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/stv1076","ama":"Sobral D, Matthee JJ, Best PN, et al. CF-HiZELS, an ∼10 deg2 emission-line survey with spectroscopic follow-up: Hα, [O III] + Hβ and [O II] luminosity functions at z = 0.8, 1.4 and 2.2 . Monthly Notices of the Royal Astronomical Society. 2015;451(3):2303-2323. doi:10.1093/mnras/stv1076"},"author":[{"last_name":"Sobral","full_name":"Sobral, D.","first_name":"D."},{"orcid":"0000-0003-2871-127X","id":"7439a258-f3c0-11ec-9501-9df22fe06720","first_name":"Jorryt J","full_name":"Matthee, Jorryt J","last_name":"Matthee"},{"first_name":"P. N.","full_name":"Best, P. N.","last_name":"Best"},{"first_name":"I.","full_name":"Smail, I.","last_name":"Smail"},{"last_name":"Khostovan","first_name":"A. A.","full_name":"Khostovan, A. A."},{"first_name":"B.","full_name":"Milvang-Jensen, B.","last_name":"Milvang-Jensen"},{"first_name":"J.-W.","full_name":"Kim, J.-W.","last_name":"Kim"},{"full_name":"Stott, J.","first_name":"J.","last_name":"Stott"},{"last_name":"Calhau","first_name":"J.","full_name":"Calhau, J."},{"first_name":"H.","full_name":"Nayyeri, H.","last_name":"Nayyeri"},{"full_name":"Mobasher, B.","first_name":"B.","last_name":"Mobasher"}],"type":"journal_article","day":"11","main_file_link":[{"url":"https://arxiv.org/abs/1502.06602","open_access":"1"}],"oa":1,"publication_status":"published","volume":451,"article_processing_charge":"No","issue":"3","arxiv":1,"abstract":[{"lang":"eng","text":"We present results from the largest contiguous narrow-band survey in the near-infrared. We have used the wide-field infrared camera/Canada–France–Hawaii Telescope and the lowOH2 filter (1.187 ± 0.005 μm) to survey ≈10 deg2 of contiguous extragalactic sky in the SA22 field. A total of ∼6000 candidate emission-line galaxies are found. We use deep ugrizJK data to obtain robust photometric redshifts. We combine our data with the High-redshift(Z) Emission Line Survey (HiZELS), explore spectroscopic surveys (VVDS, VIPERS) and obtain our own spectroscopic follow-up with KMOS, FMOS and MOSFIRE to derive large samples of high-redshift emission-line selected galaxies: 3471 Hα emitters at z = 0.8, 1343 [O III] + Hβ emitters at z = 1.4 and 572 [O II] emitters at z = 2.2. We probe comoving volumes of >106 Mpc3 and find significant overdensities, including an 8.5σ (spectroscopically confirmed) overdensity of Hα emitters at z = 0.81. We derive Hα, [O III] + Hβ and [O II] luminosity functions at z = 0.8, 1.4, 2.2, respectively, and present implications for future surveys such as Euclid. Our uniquely large volumes/areas allow us to subdivide the samples in thousands of randomized combinations of areas and provide a robust empirical measurement of sample/cosmic variance. We show that surveys for star-forming/emission-line galaxies at a depth similar to ours can only overcome cosmic-variance (errors <10 per cent) if they are based on volumes >5 × 105 Mpc3; errors on L* and ϕ* due to sample (cosmic) variance on surveys probing ∼104 and ∼105 Mpc3 are typically very high: ∼300 and ∼40–60 per cent, respectively."}],"_id":"11580","date_published":"2015-08-11T00:00:00Z","publication_identifier":{"eissn":["1365-2966"],"issn":["0035-8711"]},"external_id":{"arxiv":["1502.06602"]},"scopus_import":"1","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","date_updated":"2022-08-19T08:23:18Z","oa_version":"Preprint","year":"2015","article_type":"original"},{"article_type":"original","oa_version":"Preprint","year":"2015","scopus_import":"1","external_id":{"arxiv":["1502.07355"]},"date_updated":"2022-08-19T08:25:25Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","publication_identifier":{"issn":["0035-8711"],"eissn":["1365-2966"]},"date_published":"2015-07-21T00:00:00Z","_id":"11581","abstract":[{"text":"Using wide-field narrow-band surveys, we provide a new measurement of the z = 6.6 Lymanα emitter (LAE) luminosity function (LF), which constraints the bright end for the first time. We use a combination of archival narrow-band NB921 data in UDS and new NB921 measurements in SA22 and COSMOS/UltraVISTA, all observed with the Subaru telescope, with a total area of ∼5 deg2. We exclude lower redshift interlopers by using broad-band optical and near-infrared photometry and also exclude three supernovae with data split over multiple epochs. Combining the UDS and COSMOS samples, we find no evolution of the bright end of the Lyα LF between z = 5.7 and 6.6, which is supported by spectroscopic follow-up, and conclude that sources with Himiko-like luminosity are not as rare as previously thought, with number densities of ∼1.5 × 10−5 Mpc−3. Combined with our wide-field SA22 measurements, our results indicate a non-Schechter-like bright end of the LF at z = 6.6 and a different evolution of observed faint and bright LAEs, overcoming cosmic variance. This differential evolution is also seen in the spectroscopic follow-up of UV-selected galaxies and is now also confirmed for LAEs, and we argue that it may be an effect of reionization. Using a toy model, we show that such differential evolution of the LF is expected, since brighter sources are able to ionize their surroundings earlier, such that Lyα photons are able to escape. Our targets are excellent candidates for detailed follow-up studies and provide the possibility to give a unique view on the earliest stages in the formation of galaxies and reionization process.","lang":"eng"}],"arxiv":1,"article_processing_charge":"No","issue":"1","volume":451,"publication_status":"published","oa":1,"main_file_link":[{"url":"https://arxiv.org/abs/1502.07355","open_access":"1"}],"day":"21","author":[{"full_name":"Matthee, Jorryt J","first_name":"Jorryt J","last_name":"Matthee","orcid":"0000-0003-2871-127X","id":"7439a258-f3c0-11ec-9501-9df22fe06720"},{"first_name":"David","full_name":"Sobral, David","last_name":"Sobral"},{"first_name":"Sérgio","full_name":"Santos, Sérgio","last_name":"Santos"},{"last_name":"Röttgering","full_name":"Röttgering, Huub","first_name":"Huub"},{"last_name":"Darvish","full_name":"Darvish, Behnam","first_name":"Behnam"},{"last_name":"Mobasher","full_name":"Mobasher, Bahram","first_name":"Bahram"}],"type":"journal_article","citation":{"chicago":"Matthee, Jorryt J, David Sobral, Sérgio Santos, Huub Röttgering, Behnam Darvish, and Bahram Mobasher. “Identification of the Brightest Lyα Emitters at z = 6.6: Implications for the Evolution of the Luminosity Function in the Reionization Era.” Monthly Notices of the Royal Astronomical Society. Oxford University Press, 2015. https://doi.org/10.1093/mnras/stv947.","ista":"Matthee JJ, Sobral D, Santos S, Röttgering H, Darvish B, Mobasher B. 2015. Identification of the brightest Lyα emitters at z = 6.6: implications for the evolution of the luminosity function in the reionization era. Monthly Notices of the Royal Astronomical Society. 451(1), 400–417.","ieee":"J. J. Matthee, D. Sobral, S. Santos, H. Röttgering, B. Darvish, and B. Mobasher, “Identification of the brightest Lyα emitters at z = 6.6: implications for the evolution of the luminosity function in the reionization era,” Monthly Notices of the Royal Astronomical Society, vol. 451, no. 1. Oxford University Press, pp. 400–417, 2015.","mla":"Matthee, Jorryt J., et al. “Identification of the Brightest Lyα Emitters at z = 6.6: Implications for the Evolution of the Luminosity Function in the Reionization Era.” Monthly Notices of the Royal Astronomical Society, vol. 451, no. 1, Oxford University Press, 2015, pp. 400–17, doi:10.1093/mnras/stv947.","short":"J.J. Matthee, D. Sobral, S. Santos, H. Röttgering, B. Darvish, B. Mobasher, Monthly Notices of the Royal Astronomical Society 451 (2015) 400–417.","ama":"Matthee JJ, Sobral D, Santos S, Röttgering H, Darvish B, Mobasher B. Identification of the brightest Lyα emitters at z = 6.6: implications for the evolution of the luminosity function in the reionization era. Monthly Notices of the Royal Astronomical Society. 2015;451(1):400-417. doi:10.1093/mnras/stv947","apa":"Matthee, J. J., Sobral, D., Santos, S., Röttgering, H., Darvish, B., & Mobasher, B. (2015). Identification of the brightest Lyα emitters at z = 6.6: implications for the evolution of the luminosity function in the reionization era. Monthly Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/stv947"},"title":"Identification of the brightest Lyα emitters at z = 6.6: implications for the evolution of the luminosity function in the reionization era","keyword":["Space and Planetary Science","Astronomy and Astrophysics"],"language":[{"iso":"eng"}],"doi":"10.1093/mnras/stv947","acknowledgement":"We thank the anonymous referee for the comments and suggestions which have improved the quality of this work. We thank Masami Ouchi for his useful comments on an earlier version of this paper. JM acknowledges the support of a Huygens PhD fellowship from Leiden University and is thankful for the hospitality of the Center for Astronomy and Astrophysics of the University of Lisbon where part of this research has been done. DS acknowledges financial support from the Netherlands Organization for Scientific research (NWO) through a Veni fellowship, from FCT through a FCT Investigator Starting Grant and Start-up Grant (IF/01154/2012/CP0189/CT0010) and from FCT grant PEstOE/FIS/UI2751/2014. HR acknowledges support from the ERC Advanced Investigator programme NewClusters 321271. We acknowledge the award of ESO DDT time (294.A-5018) for providing the possibility of a timely publication of this work.\r\nBased on observations with the Subaru Telescope (Programme IDs: our observations: S14A-086; archival: S05B-027, S06A-025, S06B-010, S07A-013, S07B-008, S08B-008 and S09A-017) and the W.M. Keck Observatory. The Subaru telescope is operated by the National Astronomical Observatory of Japan. The W.M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. Based on observations made with ESO Telescopes at the La Silla Paranal Observatory under programme ID 294.A-5018. Based on observations obtained with MegaPrime/Megacam, a joint project of CFHT and CEA/IRFU, at the Canada–France-Hawaii Telescope (CFHT) which is operated by the National Research Council (NRC) of Canada, the Institut National des Science de l’Univers of the Centre National de la Recherche Scientifique (CNRS) of France, and the University of Hawaii. This work is based in part on data products produced at Terapix available at the Canadian Astronomy Data Centre as part of the CFHT Legacy Survey, a collaborative project of NRC and CNRS. Based on data products from observations made with ESO Telescopes at the La Silla Paranal Observatory under ESO programme ID 179.A-2005 and on data products produced by TERAPIX and the Cambridge Astronomy Survey Unit on behalf of the UltraVISTA consortium.\r\nIn addition to the CFHT-LS and COSMOS-UltraVISTA surveys, we are grateful for the excellent data sets from the UKIRT-DXS, SXDF and S-COSMOS survey teams, without these legacy surveys, this research would have been impossible. We have benefited greatly from the public available programming language PYTHON, including the NUMPY, MATPLOTLIB, PYFITS, SCIPY and ASTROPY packages, the astronomical imaging tools SEXTRACTOR, SWARP and SCAMP and the indispensable TOPCAT analysis tool (Taylor 2013)","month":"07","extern":"1","date_created":"2022-07-14T11:57:03Z","page":"400-417","publication":"Monthly Notices of the Royal Astronomical Society","quality_controlled":"1","status":"public","intvolume":" 451","publisher":"Oxford University Press"},{"publisher":"Springer Nature","publication_status":"published","quality_controlled":"1","publication":"Nature Communications","volume":6,"status":"public","intvolume":" 6","article_processing_charge":"No","extern":"1","article_number":"8361","month":"10","date_created":"2020-09-18T10:07:36Z","_id":"8456","abstract":[{"lang":"eng","text":"The large majority of three-dimensional structures of biological macromolecules have been determined by X-ray diffraction of crystalline samples. High-resolution structure determination crucially depends on the homogeneity of the protein crystal. Overall ‘rocking’ motion of molecules in the crystal is expected to influence diffraction quality, and such motion may therefore affect the process of solving crystal structures. Yet, so far overall molecular motion has not directly been observed in protein crystals, and the timescale of such dynamics remains unclear. Here we use solid-state NMR, X-ray diffraction methods and μs-long molecular dynamics simulations to directly characterize the rigid-body motion of a protein in different crystal forms. For ubiquitin crystals investigated in this study we determine the range of possible correlation times of rocking motion, 0.1–100 μs. The amplitude of rocking varies from one crystal form to another and is correlated with the resolution obtainable in X-ray diffraction experiments."}],"date_published":"2015-10-05T00:00:00Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","date_updated":"2021-01-12T08:19:24Z","language":[{"iso":"eng"}],"keyword":["General Biochemistry","Genetics and Molecular Biology","General Physics and Astronomy","General Chemistry"],"doi":"10.1038/ncomms9361","publication_identifier":{"issn":["2041-1723"]},"citation":{"short":"P. Ma, Y. Xue, N. Coquelle, J.D. Haller, T. Yuwen, I. Ayala, O. Mikhailovskii, D. Willbold, J.-P. Colletier, N.R. Skrynnikov, P. Schanda, Nature Communications 6 (2015).","apa":"Ma, P., Xue, Y., Coquelle, N., Haller, J. D., Yuwen, T., Ayala, I., … Schanda, P. (2015). Observing the overall rocking motion of a protein in a crystal. Nature Communications. Springer Nature. https://doi.org/10.1038/ncomms9361","ama":"Ma P, Xue Y, Coquelle N, et al. Observing the overall rocking motion of a protein in a crystal. Nature Communications. 2015;6. doi:10.1038/ncomms9361","ieee":"P. Ma et al., “Observing the overall rocking motion of a protein in a crystal,” Nature Communications, vol. 6. Springer Nature, 2015.","ista":"Ma P, Xue Y, Coquelle N, Haller JD, Yuwen T, Ayala I, Mikhailovskii O, Willbold D, Colletier J-P, Skrynnikov NR, Schanda P. 2015. Observing the overall rocking motion of a protein in a crystal. Nature Communications. 6, 8361.","chicago":"Ma, Peixiang, Yi Xue, Nicolas Coquelle, Jens D. Haller, Tairan Yuwen, Isabel Ayala, Oleg Mikhailovskii, et al. “Observing the Overall Rocking Motion of a Protein in a Crystal.” Nature Communications. Springer Nature, 2015. https://doi.org/10.1038/ncomms9361.","mla":"Ma, Peixiang, et al. “Observing the Overall Rocking Motion of a Protein in a Crystal.” Nature Communications, vol. 6, 8361, Springer Nature, 2015, doi:10.1038/ncomms9361."},"title":"Observing the overall rocking motion of a protein in a crystal","day":"05","article_type":"original","year":"2015","oa_version":"Published Version","type":"journal_article","author":[{"last_name":"Ma","first_name":"Peixiang","full_name":"Ma, Peixiang"},{"last_name":"Xue","full_name":"Xue, Yi","first_name":"Yi"},{"last_name":"Coquelle","first_name":"Nicolas","full_name":"Coquelle, Nicolas"},{"first_name":"Jens D.","full_name":"Haller, Jens D.","last_name":"Haller"},{"last_name":"Yuwen","full_name":"Yuwen, Tairan","first_name":"Tairan"},{"last_name":"Ayala","full_name":"Ayala, Isabel","first_name":"Isabel"},{"full_name":"Mikhailovskii, Oleg","first_name":"Oleg","last_name":"Mikhailovskii"},{"full_name":"Willbold, Dieter","first_name":"Dieter","last_name":"Willbold"},{"first_name":"Jacques-Philippe","full_name":"Colletier, Jacques-Philippe","last_name":"Colletier"},{"first_name":"Nikolai R.","full_name":"Skrynnikov, Nikolai R.","last_name":"Skrynnikov"},{"full_name":"Schanda, Paul","first_name":"Paul","last_name":"Schanda","id":"7B541462-FAF6-11E9-A490-E8DFE5697425","orcid":"0000-0002-9350-7606"}]},{"publication_identifier":{"issn":["0951-7715","1361-6544"]},"doi":"10.1088/0951-7715/28/8/2699","keyword":["Mathematical Physics","General Physics and Astronomy","Applied Mathematics","Statistical and Nonlinear Physics"],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","language":[{"iso":"eng"}],"date_updated":"2021-01-12T08:19:41Z","type":"journal_article","author":[{"first_name":"Vadim","full_name":"Kaloshin, Vadim","last_name":"Kaloshin","id":"FE553552-CDE8-11E9-B324-C0EBE5697425","orcid":"0000-0002-6051-2628"},{"first_name":"K","full_name":"Zhang, K","last_name":"Zhang"}],"year":"2015","oa_version":"None","article_type":"original","day":"30","title":"Arnold diffusion for smooth convex systems of two and a half degrees of freedom","citation":{"mla":"Kaloshin, Vadim, and K. Zhang. “Arnold Diffusion for Smooth Convex Systems of Two and a Half Degrees of Freedom.” Nonlinearity, vol. 28, no. 8, IOP Publishing, 2015, pp. 2699–720, doi:10.1088/0951-7715/28/8/2699.","chicago":"Kaloshin, Vadim, and K Zhang. “Arnold Diffusion for Smooth Convex Systems of Two and a Half Degrees of Freedom.” Nonlinearity. IOP Publishing, 2015. https://doi.org/10.1088/0951-7715/28/8/2699.","ista":"Kaloshin V, Zhang K. 2015. Arnold diffusion for smooth convex systems of two and a half degrees of freedom. Nonlinearity. 28(8), 2699–2720.","ieee":"V. Kaloshin and K. Zhang, “Arnold diffusion for smooth convex systems of two and a half degrees of freedom,” Nonlinearity, vol. 28, no. 8. IOP Publishing, pp. 2699–2720, 2015.","ama":"Kaloshin V, Zhang K. Arnold diffusion for smooth convex systems of two and a half degrees of freedom. Nonlinearity. 2015;28(8):2699-2720. doi:10.1088/0951-7715/28/8/2699","apa":"Kaloshin, V., & Zhang, K. (2015). Arnold diffusion for smooth convex systems of two and a half degrees of freedom. Nonlinearity. IOP Publishing. https://doi.org/10.1088/0951-7715/28/8/2699","short":"V. Kaloshin, K. Zhang, Nonlinearity 28 (2015) 2699–2720."},"intvolume":" 28","status":"public","volume":28,"publication":"Nonlinearity","quality_controlled":"1","publication_status":"published","publisher":"IOP Publishing","date_created":"2020-09-18T10:46:43Z","_id":"8498","date_published":"2015-06-30T00:00:00Z","abstract":[{"lang":"eng","text":"In the present note we announce a proof of a strong form of Arnold diffusion for smooth convex Hamiltonian systems. Let ${\\mathbb T}^2$ be a 2-dimensional torus and B2 be the unit ball around the origin in ${\\mathbb R}^2$ . Fix ρ > 0. Our main result says that for a 'generic' time-periodic perturbation of an integrable system of two degrees of freedom $H_0(p)+\\varepsilon H_1(\\theta,p,t),\\quad \\ \\theta\\in {\\mathbb T}^2,\\ p\\in B^2,\\ t\\in {\\mathbb T}={\\mathbb R}/{\\mathbb Z}$ , with a strictly convex H0, there exists a ρ-dense orbit (θε, pε, t)(t) in ${\\mathbb T}^2 \\times B^2 \\times {\\mathbb T}$ , namely, a ρ-neighborhood of the orbit contains ${\\mathbb T}^2 \\times B^2 \\times {\\mathbb T}$ .\r\n\r\nOur proof is a combination of geometric and variational methods. The fundamental elements of the construction are the usage of crumpled normally hyperbolic invariant cylinders from [9], flower and simple normally hyperbolic invariant manifolds from [36] as well as their kissing property at a strong double resonance. This allows us to build a 'connected' net of three-dimensional normally hyperbolic invariant manifolds. To construct diffusing orbits along this net we employ a version of the Mather variational method [41] equipped with weak KAM theory [28], proposed by Bernard in [7]."}],"month":"06","extern":"1","article_processing_charge":"No","issue":"8","page":"2699-2720"},{"article_type":"original","oa_version":"Published Version","year":"2015","scopus_import":"1","date_updated":"2023-08-22T08:51:33Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","publication_identifier":{"issn":["1742-6588"],"eissn":["1742-6596"]},"article_processing_charge":"No","issue":"11","article_number":"112135","_id":"14014","date_published":"2015-11-01T00:00:00Z","abstract":[{"text":"We have studied a coupled electronic-nuclear wave packet in nitric oxide using time-resolved strong-field photoelectron holography and rescattering. We show that the electronic dynamics mainly appears in the holographic structures whereas nuclear motion strongly modulates the angular distribution of the rescattered photoelectrons.","lang":"eng"}],"publication_status":"published","main_file_link":[{"url":"https://doi.org/10.1088/1742-6596/635/11/112135","open_access":"1"}],"oa":1,"volume":635,"citation":{"ama":"Walt SG, Ram NB, von Conta A, Baykusheva DR, Atala M, Wörner HJ. Resolving the dynamics of valence-shell electrons and nuclei through laser-induced diffraction and holography. Journal of Physics: Conference Series. 2015;635(11). doi:10.1088/1742-6596/635/11/112135","apa":"Walt, S. G., Ram, N. B., von Conta, A., Baykusheva, D. R., Atala, M., & Wörner, H. J. (2015). Resolving the dynamics of valence-shell electrons and nuclei through laser-induced diffraction and holography. Journal of Physics: Conference Series. IOP Publishing. https://doi.org/10.1088/1742-6596/635/11/112135","short":"S.G. Walt, N.B. Ram, A. von Conta, D.R. Baykusheva, M. Atala, H.J. Wörner, Journal of Physics: Conference Series 635 (2015).","mla":"Walt, Samuel G., et al. “Resolving the Dynamics of Valence-Shell Electrons and Nuclei through Laser-Induced Diffraction and Holography.” Journal of Physics: Conference Series, vol. 635, no. 11, 112135, IOP Publishing, 2015, doi:10.1088/1742-6596/635/11/112135.","chicago":"Walt, Samuel G, N Bhargava Ram, Aaron von Conta, Denitsa Rangelova Baykusheva, Marcos Atala, and Hans Jakob Wörner. “Resolving the Dynamics of Valence-Shell Electrons and Nuclei through Laser-Induced Diffraction and Holography.” Journal of Physics: Conference Series. IOP Publishing, 2015. https://doi.org/10.1088/1742-6596/635/11/112135.","ieee":"S. G. Walt, N. B. Ram, A. von Conta, D. R. Baykusheva, M. Atala, and H. J. Wörner, “Resolving the dynamics of valence-shell electrons and nuclei through laser-induced diffraction and holography,” Journal of Physics: Conference Series, vol. 635, no. 11. IOP Publishing, 2015.","ista":"Walt SG, Ram NB, von Conta A, Baykusheva DR, Atala M, Wörner HJ. 2015. Resolving the dynamics of valence-shell electrons and nuclei through laser-induced diffraction and holography. Journal of Physics: Conference Series. 635(11), 112135."},"title":"Resolving the dynamics of valence-shell electrons and nuclei through laser-induced diffraction and holography","day":"01","author":[{"last_name":"Walt","full_name":"Walt, Samuel G","first_name":"Samuel G"},{"last_name":"Ram","full_name":"Ram, N Bhargava","first_name":"N Bhargava"},{"first_name":"Aaron","full_name":"von Conta, Aaron","last_name":"von Conta"},{"id":"71b4d059-2a03-11ee-914d-dfa3beed6530","full_name":"Baykusheva, Denitsa Rangelova","first_name":"Denitsa Rangelova","last_name":"Baykusheva"},{"first_name":"Marcos","full_name":"Atala, Marcos","last_name":"Atala"},{"last_name":"Wörner","full_name":"Wörner, Hans Jakob","first_name":"Hans Jakob"}],"type":"journal_article","keyword":["General Physics and Astronomy"],"language":[{"iso":"eng"}],"doi":"10.1088/1742-6596/635/11/112135","month":"11","extern":"1","date_created":"2023-08-10T06:37:44Z","publisher":"IOP Publishing","publication":"Journal of Physics: Conference Series","quality_controlled":"1","intvolume":" 635","status":"public"},{"scopus_import":"1","date_updated":"2023-08-22T08:49:14Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","publication_identifier":{"eissn":["1742-6596"],"issn":["1742-6588"]},"article_type":"original","year":"2015","oa_version":"Published Version","volume":635,"publication_status":"published","oa":1,"main_file_link":[{"open_access":"1","url":"https://doi.org/10.1088/1742-6596/635/11/112136"}],"article_number":"112136","abstract":[{"lang":"eng","text":"We advance high-harmonic spectroscopy to resolve molecular charge migration in time and space and simultaneously demonstrate extensive control over the process. A multidimensional approach enables us to reconstruct both quantum amplitudes and phases with a resolution of better than 100 attoseconds and to separately reconstruct field-free and laser- driven charge migration. Our techniques make charge migration in molecules measurable on the attosecond time scale and open new avenues for laser control of electronic primary processes."}],"_id":"14015","date_published":"2015-07-01T00:00:00Z","article_processing_charge":"No","issue":"11","keyword":["General Physics and Astronomy"],"language":[{"iso":"eng"}],"doi":"10.1088/1742-6596/635/11/112136","day":"01","author":[{"last_name":"Kraus","full_name":"Kraus, P M","first_name":"P M"},{"last_name":"Mignolet","full_name":"Mignolet, B","first_name":"B"},{"id":"71b4d059-2a03-11ee-914d-dfa3beed6530","full_name":"Baykusheva, Denitsa Rangelova","first_name":"Denitsa Rangelova","last_name":"Baykusheva"},{"last_name":"Rupenyan","full_name":"Rupenyan, A","first_name":"A"},{"last_name":"Horný","first_name":"L","full_name":"Horný, L"},{"first_name":"E F","full_name":"Penka, E F","last_name":"Penka"},{"full_name":"Tolstikhin, O I","first_name":"O I","last_name":"Tolstikhin"},{"first_name":"J","full_name":"Schneider, J","last_name":"Schneider"},{"last_name":"Jensen","full_name":"Jensen, F","first_name":"F"},{"last_name":"Madsen","first_name":"L B","full_name":"Madsen, L B"},{"last_name":"Bandrauk","full_name":"Bandrauk, A D","first_name":"A D"},{"first_name":"F","full_name":"Remacle, F","last_name":"Remacle"},{"full_name":"Wörner, H J","first_name":"H J","last_name":"Wörner"}],"type":"journal_article","citation":{"short":"P.M. Kraus, B. Mignolet, D.R. Baykusheva, A. Rupenyan, L. Horný, E.F. Penka, O.I. Tolstikhin, J. Schneider, F. Jensen, L.B. Madsen, A.D. Bandrauk, F. Remacle, H.J. Wörner, Journal of Physics: Conference Series 635 (2015).","ama":"Kraus PM, Mignolet B, Baykusheva DR, et al. Attosecond charge migration and its laser control. Journal of Physics: Conference Series. 2015;635(11). doi:10.1088/1742-6596/635/11/112136","apa":"Kraus, P. M., Mignolet, B., Baykusheva, D. R., Rupenyan, A., Horný, L., Penka, E. F., … Wörner, H. J. (2015). Attosecond charge migration and its laser control. Journal of Physics: Conference Series. IOP Publishing. https://doi.org/10.1088/1742-6596/635/11/112136","chicago":"Kraus, P M, B Mignolet, Denitsa Rangelova Baykusheva, A Rupenyan, L Horný, E F Penka, O I Tolstikhin, et al. “Attosecond Charge Migration and Its Laser Control.” Journal of Physics: Conference Series. IOP Publishing, 2015. https://doi.org/10.1088/1742-6596/635/11/112136.","ista":"Kraus PM, Mignolet B, Baykusheva DR, Rupenyan A, Horný L, Penka EF, Tolstikhin OI, Schneider J, Jensen F, Madsen LB, Bandrauk AD, Remacle F, Wörner HJ. 2015. Attosecond charge migration and its laser control. Journal of Physics: Conference Series. 635(11), 112136.","ieee":"P. M. Kraus et al., “Attosecond charge migration and its laser control,” Journal of Physics: Conference Series, vol. 635, no. 11. IOP Publishing, 2015.","mla":"Kraus, P. M., et al. “Attosecond Charge Migration and Its Laser Control.” Journal of Physics: Conference Series, vol. 635, no. 11, 112136, IOP Publishing, 2015, doi:10.1088/1742-6596/635/11/112136."},"title":"Attosecond charge migration and its laser control","publication":"Journal of Physics: Conference Series","quality_controlled":"1","status":"public","intvolume":" 635","publisher":"IOP Publishing","month":"07","extern":"1","date_created":"2023-08-10T06:37:53Z"},{"volume":6,"main_file_link":[{"open_access":"1","url":"https://doi.org/10.1038/ncomms8039"}],"oa":1,"publication_status":"published","abstract":[{"lang":"eng","text":"All attosecond time-resolved measurements have so far relied on the use of intense near-infrared laser pulses. In particular, attosecond streaking, laser-induced electron diffraction and high-harmonic generation all make use of non-perturbative light–matter interactions. Remarkably, the effect of the strong laser field on the studied sample has often been neglected in previous studies. Here we use high-harmonic spectroscopy to measure laser-induced modifications of the electronic structure of molecules. We study high-harmonic spectra of spatially oriented CH3F and CH3Br as generic examples of polar polyatomic molecules. We accurately measure intensity ratios of even and odd-harmonic orders, and of the emission from aligned and unaligned molecules. We show that these robust observables reveal a substantial modification of the molecular electronic structure by the external laser field. Our insights offer new challenges and opportunities for a range of emerging strong-field attosecond spectroscopies."}],"_id":"14016","date_published":"2015-05-05T00:00:00Z","article_number":"7039","article_processing_charge":"No","publication_identifier":{"eissn":["2041-1723"]},"date_updated":"2023-08-22T08:52:56Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","scopus_import":"1","external_id":{"pmid":["25940229"]},"year":"2015","oa_version":"Published Version","article_type":"original","intvolume":" 6","status":"public","quality_controlled":"1","publication":"Nature Communications","publisher":"Springer Nature","date_created":"2023-08-10T06:38:01Z","extern":"1","month":"05","doi":"10.1038/ncomms8039","language":[{"iso":"eng"}],"keyword":["General Physics and Astronomy","General Biochemistry","Genetics and Molecular Biology","General Chemistry","Multidisciplinary"],"pmid":1,"type":"journal_article","author":[{"first_name":"P. M.","full_name":"Kraus, P. M.","last_name":"Kraus"},{"full_name":"Tolstikhin, O. I.","first_name":"O. I.","last_name":"Tolstikhin"},{"id":"71b4d059-2a03-11ee-914d-dfa3beed6530","last_name":"Baykusheva","first_name":"Denitsa Rangelova","full_name":"Baykusheva, Denitsa Rangelova"},{"last_name":"Rupenyan","first_name":"A.","full_name":"Rupenyan, A."},{"first_name":"J.","full_name":"Schneider, J.","last_name":"Schneider"},{"last_name":"Bisgaard","full_name":"Bisgaard, C. Z.","first_name":"C. Z."},{"last_name":"Morishita","first_name":"T.","full_name":"Morishita, T."},{"first_name":"F.","full_name":"Jensen, F.","last_name":"Jensen"},{"last_name":"Madsen","full_name":"Madsen, L. B.","first_name":"L. B."},{"first_name":"H. J.","full_name":"Wörner, H. J.","last_name":"Wörner"}],"day":"05","title":"Observation of laser-induced electronic structure in oriented polyatomic molecules","citation":{"apa":"Kraus, P. M., Tolstikhin, O. I., Baykusheva, D. R., Rupenyan, A., Schneider, J., Bisgaard, C. Z., … Wörner, H. J. (2015). Observation of laser-induced electronic structure in oriented polyatomic molecules. Nature Communications. Springer Nature. https://doi.org/10.1038/ncomms8039","ama":"Kraus PM, Tolstikhin OI, Baykusheva DR, et al. Observation of laser-induced electronic structure in oriented polyatomic molecules. Nature Communications. 2015;6. doi:10.1038/ncomms8039","short":"P.M. Kraus, O.I. Tolstikhin, D.R. Baykusheva, A. Rupenyan, J. Schneider, C.Z. Bisgaard, T. Morishita, F. Jensen, L.B. Madsen, H.J. Wörner, Nature Communications 6 (2015).","mla":"Kraus, P. M., et al. “Observation of Laser-Induced Electronic Structure in Oriented Polyatomic Molecules.” Nature Communications, vol. 6, 7039, Springer Nature, 2015, doi:10.1038/ncomms8039.","ieee":"P. M. Kraus et al., “Observation of laser-induced electronic structure in oriented polyatomic molecules,” Nature Communications, vol. 6. Springer Nature, 2015.","ista":"Kraus PM, Tolstikhin OI, Baykusheva DR, Rupenyan A, Schneider J, Bisgaard CZ, Morishita T, Jensen F, Madsen LB, Wörner HJ. 2015. Observation of laser-induced electronic structure in oriented polyatomic molecules. Nature Communications. 6, 7039.","chicago":"Kraus, P. M., O. I. Tolstikhin, Denitsa Rangelova Baykusheva, A. Rupenyan, J. Schneider, C. Z. Bisgaard, T. Morishita, F. Jensen, L. B. Madsen, and H. J. Wörner. “Observation of Laser-Induced Electronic Structure in Oriented Polyatomic Molecules.” Nature Communications. Springer Nature, 2015. https://doi.org/10.1038/ncomms8039."}},{"citation":{"short":"J.P. Stott, D. Sobral, A.M. Swinbank, I. Smail, R. Bower, P.N. Best, R.M. Sharples, J.E. Geach, J.J. Matthee, Monthly Notices of the Royal Astronomical Society 443 (2014) 2695–2704.","ama":"Stott JP, Sobral D, Swinbank AM, et al. A relationship between specific star formation rate and metallicity gradient within z ∼ 1 galaxies from KMOS-HiZELS. Monthly Notices of the Royal Astronomical Society. 2014;443(3):2695-2704. doi:10.1093/mnras/stu1343","apa":"Stott, J. P., Sobral, D., Swinbank, A. M., Smail, I., Bower, R., Best, P. N., … Matthee, J. J. (2014). A relationship between specific star formation rate and metallicity gradient within z ∼ 1 galaxies from KMOS-HiZELS. Monthly Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/stu1343","chicago":"Stott, John P., David Sobral, A. M. Swinbank, Ian Smail, Richard Bower, Philip N. Best, Ray M. Sharples, James E. Geach, and Jorryt J Matthee. “A Relationship between Specific Star Formation Rate and Metallicity Gradient within z ∼ 1 Galaxies from KMOS-HiZELS.” Monthly Notices of the Royal Astronomical Society. Oxford University Press, 2014. https://doi.org/10.1093/mnras/stu1343.","ista":"Stott JP, Sobral D, Swinbank AM, Smail I, Bower R, Best PN, Sharples RM, Geach JE, Matthee JJ. 2014. A relationship between specific star formation rate and metallicity gradient within z ∼ 1 galaxies from KMOS-HiZELS. Monthly Notices of the Royal Astronomical Society. 443(3), 2695–2704.","ieee":"J. P. Stott et al., “A relationship between specific star formation rate and metallicity gradient within z ∼ 1 galaxies from KMOS-HiZELS,” Monthly Notices of the Royal Astronomical Society, vol. 443, no. 3. Oxford University Press, pp. 2695–2704, 2014.","mla":"Stott, John P., et al. “A Relationship between Specific Star Formation Rate and Metallicity Gradient within z ∼ 1 Galaxies from KMOS-HiZELS.” Monthly Notices of the Royal Astronomical Society, vol. 443, no. 3, Oxford University Press, 2014, pp. 2695–704, doi:10.1093/mnras/stu1343."},"title":"A relationship between specific star formation rate and metallicity gradient within z ∼ 1 galaxies from KMOS-HiZELS","day":"21","type":"journal_article","author":[{"first_name":"John P.","full_name":"Stott, John P.","last_name":"Stott"},{"last_name":"Sobral","full_name":"Sobral, David","first_name":"David"},{"full_name":"Swinbank, A. M.","first_name":"A. M.","last_name":"Swinbank"},{"last_name":"Smail","full_name":"Smail, Ian","first_name":"Ian"},{"last_name":"Bower","full_name":"Bower, Richard","first_name":"Richard"},{"last_name":"Best","first_name":"Philip N.","full_name":"Best, Philip N."},{"first_name":"Ray M.","full_name":"Sharples, Ray M.","last_name":"Sharples"},{"first_name":"James E.","full_name":"Geach, James E.","last_name":"Geach"},{"orcid":"0000-0003-2871-127X","id":"7439a258-f3c0-11ec-9501-9df22fe06720","last_name":"Matthee","first_name":"Jorryt J","full_name":"Matthee, Jorryt J"}],"acknowledgement":"First, we acknowledge the referee for their comments, which have improved the clarity of this paper. JPS and IRS acknowledge support from STFC (ST/I001573/1). IRS also acknowledges support from the ERC Advanced Investigator programme DUSTYGAL and a Royal Society/Wolfson Merit Award. DS acknowledges financial support from NWO through a Veni fellowship and from FCT through the award of an FCT-IF starting grant. PNB acknowledges STFC for financial support.","keyword":["Space and Planetary Science","Astronomy and Astrophysics","galaxies: abundances","galaxies: evolution","galaxies: kinematics and dynamics"],"language":[{"iso":"eng"}],"doi":"10.1093/mnras/stu1343","page":"2695-2704","month":"09","extern":"1","date_created":"2022-07-14T12:16:10Z","publisher":"Oxford University Press","publication":"Monthly Notices of the Royal Astronomical Society","quality_controlled":"1","intvolume":" 443","status":"public","article_type":"original","year":"2014","oa_version":"Preprint","scopus_import":"1","external_id":{"arxiv":["1407.1047"]},"date_updated":"2022-08-19T08:27:25Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","publication_identifier":{"eissn":["1365-2966"],"issn":["0035-8711"]},"arxiv":1,"article_processing_charge":"No","issue":"3","abstract":[{"text":"We have observed a sample of typical z ∼ 1 star-forming galaxies, selected from the HiZELS survey, with the new K-band Multi-Object Spectrograph (KMOS) near-infrared, multi-integral field unit instrument on the Very Large Telescope (VLT), in order to obtain their dynamics and metallicity gradients. The majority of our galaxies have a metallicity gradient consistent with being flat or negative (i.e. higher metallicity cores than outskirts). Intriguingly, we find a trend between metallicity gradient and specific star formation rate (sSFR), such that galaxies with a high sSFR tend to have relatively metal poor centres, a result which is strengthened when combined with data sets from the literature. This result appears to explain the discrepancies reported between different high-redshift studies and varying claims for evolution. From a galaxy evolution perspective, the trend we see would mean that a galaxy's sSFR is governed by the amount of metal-poor gas that can be funnelled into its core, triggered either by merging or through efficient accretion. In fact, merging may play a significant role as it is the starburst galaxies at all epochs, which have the more positive metallicity gradients. Our results may help to explain the origin of the fundamental metallicity relation, in which galaxies at a fixed mass are observed to have lower metallicities at higher star formation rates, especially if the metallicity is measured in an aperture encompassing only the central regions of the galaxy. Finally, we note that this study demonstrates the power of KMOS as an efficient instrument for large-scale resolved galaxy surveys.","lang":"eng"}],"_id":"11582","date_published":"2014-09-21T00:00:00Z","publication_status":"published","oa":1,"main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/1407.1047"}],"volume":443},{"page":"2375-2387","date_created":"2022-07-14T12:33:24Z","extern":"1","month":"05","publisher":"Oxford University Press","status":"public","intvolume":" 440","quality_controlled":"1","publication":"Monthly Notices of the Royal Astronomical Society","title":"A 10 deg2 Lyman α survey at z=8.8 with spectroscopic follow-up: Strong constraints on the luminosity function and implications for other surveys","citation":{"short":"J.J. Matthee, D. Sobral, A.M. Swinbank, I. Smail, P.N. Best, J.-W. Kim, M. Franx, B. Milvang-Jensen, J. Fynbo, Monthly Notices of the Royal Astronomical Society 440 (2014) 2375–2387.","ama":"Matthee JJ, Sobral D, Swinbank AM, et al. A 10 deg2 Lyman α survey at z=8.8 with spectroscopic follow-up: Strong constraints on the luminosity function and implications for other surveys. Monthly Notices of the Royal Astronomical Society. 2014;440(3):2375-2387. doi:10.1093/mnras/stu392","apa":"Matthee, J. J., Sobral, D., Swinbank, A. M., Smail, I., Best, P. N., Kim, J.-W., … Fynbo, J. (2014). A 10 deg2 Lyman α survey at z=8.8 with spectroscopic follow-up: Strong constraints on the luminosity function and implications for other surveys. Monthly Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/stu392","chicago":"Matthee, Jorryt J, David Sobral, A. M. Swinbank, Ian Smail, P. N. Best, Jae-Woo Kim, Marijn Franx, Bo Milvang-Jensen, and Johan Fynbo. “A 10 Deg2 Lyman α Survey at Z=8.8 with Spectroscopic Follow-up: Strong Constraints on the Luminosity Function and Implications for Other Surveys.” Monthly Notices of the Royal Astronomical Society. Oxford University Press, 2014. https://doi.org/10.1093/mnras/stu392.","ista":"Matthee JJ, Sobral D, Swinbank AM, Smail I, Best PN, Kim J-W, Franx M, Milvang-Jensen B, Fynbo J. 2014. A 10 deg2 Lyman α survey at z=8.8 with spectroscopic follow-up: Strong constraints on the luminosity function and implications for other surveys. Monthly Notices of the Royal Astronomical Society. 440(3), 2375–2387.","ieee":"J. J. Matthee et al., “A 10 deg2 Lyman α survey at z=8.8 with spectroscopic follow-up: Strong constraints on the luminosity function and implications for other surveys,” Monthly Notices of the Royal Astronomical Society, vol. 440, no. 3. Oxford University Press, pp. 2375–2387, 2014.","mla":"Matthee, Jorryt J., et al. “A 10 Deg2 Lyman α Survey at Z=8.8 with Spectroscopic Follow-up: Strong Constraints on the Luminosity Function and Implications for Other Surveys.” Monthly Notices of the Royal Astronomical Society, vol. 440, no. 3, Oxford University Press, 2014, pp. 2375–87, doi:10.1093/mnras/stu392."},"author":[{"last_name":"Matthee","full_name":"Matthee, Jorryt J","first_name":"Jorryt J","id":"7439a258-f3c0-11ec-9501-9df22fe06720","orcid":"0000-0003-2871-127X"},{"full_name":"Sobral, David","first_name":"David","last_name":"Sobral"},{"last_name":"Swinbank","first_name":"A. M.","full_name":"Swinbank, A. M."},{"full_name":"Smail, Ian","first_name":"Ian","last_name":"Smail"},{"last_name":"Best","first_name":"P. N.","full_name":"Best, P. N."},{"first_name":"Jae-Woo","full_name":"Kim, Jae-Woo","last_name":"Kim"},{"full_name":"Franx, Marijn","first_name":"Marijn","last_name":"Franx"},{"last_name":"Milvang-Jensen","full_name":"Milvang-Jensen, Bo","first_name":"Bo"},{"full_name":"Fynbo, Johan","first_name":"Johan","last_name":"Fynbo"}],"type":"journal_article","day":"21","acknowledgement":"We thank the anonymous referee for the comments and suggestions which improved both the quality and clarity of this work. DS acknowledges financial support from the Netherlands Organisation for Scientific Research (NWO) through a Veni fellowship. IRS acknowledges support from STFC (ST/I001573/1), a Leverhulme Fellowship, the ERC Advanced Investigator programme DUSTYGAL 321334 and a Royal Society/Wolfson Merit Award. PNB acknowledges support from the Leverhulme Trust. JWK acknowledges the support from the Creative Research Initiative Program, no. 2008- 0060544, of the National Research Foundation of Korea (NRF) funded by the Korean government (MSIP). JPUF and BMJ acknowledge support from the ERC-StG grant EGGS-278202. The Dark Cosmology Centre is funded by the Danish National Research Foundation. This work is based in part on data obtained as part of the UKIRT Infrared Deep Sky Survey. Based on observations obtained with MegaPrime/MegaCam, a joint project of CFHT and CEA/IRFU, at the Canada–France–Hawaii Telescope (CFHT) which is operated by the National Research Council (NRC) of Canada, the Institut National des Science de l’Univers of the Centre National de la Recherche Scientifique (CNRS) of France and the University of Hawaii. This work is based in part on data products produced at Terapix available at the Canadian Astronomy Data Centre as part of the Canada-France-Hawaii Telescope Legacy Survey, a collaborative project of NRC and CNRS. This work was only possible due to OPTICON/FP7 and the access that it granted to the CFHT telescope. The authors also wish to acknowledge the CFHTLS and UKIDSS surveys for their excellent legacy and complementary value – without such high-quality data sets, this research would not have been possible.","doi":"10.1093/mnras/stu392","language":[{"iso":"eng"}],"keyword":["Space and Planetary Science","Astronomy and Astrophysics","galaxies: evolution","galaxies: high-redshift","cosmology: observations","dark ages","reionization","first stars"],"issue":"3","article_processing_charge":"No","arxiv":1,"_id":"11583","date_published":"2014-05-21T00:00:00Z","abstract":[{"text":"Candidate galaxies at redshifts of z ∼ 10 are now being found in extremely deep surveys, probing very small areas. As a consequence, candidates are very faint, making spectroscopic confirmation practically impossible. In order to overcome such limitations, we have undertaken the CF-HiZELS survey, which is a large-area, medium-depth near-infrared narrow-band survey targeted at z = 8.8 Lyman α (Lyα) emitters (LAEs) and covering 10 deg2 in part of the SSA22 field with the Canada–France–Hawaii Telescope (CFHT). We surveyed a comoving volume of 4.7 × 106 Mpc3 to a Lyα luminosity limit of 6.3 × 1043舁erg舁s−1. We look for Lyα candidates by applying the following criteria: (i) clear emission-line source, (ii) no optical detections (ugriz from CFHTLS), (iii) no visible detection in the optical stack (ugriz > 27), (iv) visually checked reliable NBJ and J detections and (v) J − K ≤ 0. We compute photometric redshifts and remove a significant amount of dusty lower redshift line-emitters at z ∼ 1.4 or 2.2. A total of 13 Lyα candidates were found, of which two are marked as strong candidates, but the majority have very weak constraints on their spectral energy distributions. Using follow-up observations with SINFONI/VLT, we are able to exclude the most robust candidates as LAEs. We put a strong constraint on the Lyα luminosity function at z ∼ 9 and make realistic predictions for ongoing and future surveys. Our results show that surveys for the highest redshift LAEs are susceptible of multiple contaminations and that spectroscopic follow-up is absolutely necessary.","lang":"eng"}],"oa":1,"main_file_link":[{"url":"https://arxiv.org/abs/1402.6697","open_access":"1"}],"publication_status":"published","volume":440,"year":"2014","oa_version":"Preprint","article_type":"original","publication_identifier":{"issn":["0035-8711"],"eissn":["1365-2966"]},"date_updated":"2022-08-19T08:30:30Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","external_id":{"arxiv":["1402.6697"]},"scopus_import":"1"},{"publisher":"American Chemical Society","status":"public","intvolume":" 8","publication":"ACS Nano","quality_controlled":"1","page":"11913-11916","date_created":"2023-08-01T09:45:42Z","month":"12","extern":"1","pmid":1,"doi":"10.1021/nn506656r","keyword":["General Physics and Astronomy","General Engineering","General Materials Science"],"language":[{"iso":"eng"}],"title":"Watching single molecules move in response to light","citation":{"apa":"Kundu, P. K., & Klajn, R. (2014). Watching single molecules move in response to light. ACS Nano. American Chemical Society. https://doi.org/10.1021/nn506656r","ama":"Kundu PK, Klajn R. Watching single molecules move in response to light. ACS Nano. 2014;8(12):11913-11916. doi:10.1021/nn506656r","short":"P.K. Kundu, R. Klajn, ACS Nano 8 (2014) 11913–11916.","mla":"Kundu, Pintu K., and Rafal Klajn. “Watching Single Molecules Move in Response to Light.” ACS Nano, vol. 8, no. 12, American Chemical Society, 2014, pp. 11913–16, doi:10.1021/nn506656r.","ieee":"P. K. Kundu and R. Klajn, “Watching single molecules move in response to light,” ACS Nano, vol. 8, no. 12. American Chemical Society, pp. 11913–11916, 2014.","ista":"Kundu PK, Klajn R. 2014. Watching single molecules move in response to light. ACS Nano. 8(12), 11913–11916.","chicago":"Kundu, Pintu K., and Rafal Klajn. “Watching Single Molecules Move in Response to Light.” ACS Nano. American Chemical Society, 2014. https://doi.org/10.1021/nn506656r."},"author":[{"last_name":"Kundu","full_name":"Kundu, Pintu K.","first_name":"Pintu K."},{"id":"8e84690e-1e48-11ed-a02b-a1e6fb8bb53b","last_name":"Klajn","full_name":"Klajn, Rafal","first_name":"Rafal"}],"type":"journal_article","day":"23","publication_status":"published","volume":8,"article_processing_charge":"No","issue":"12","abstract":[{"lang":"eng","text":"Nature has long inspired scientists with its seemingly unlimited ability to harness solar energy and to utilize it to drive various physiological processes. With the help of man-made molecular photoswitches, we now have the potential to outperform natural systems in many ways, with the ultimate goal of fabricating multifunctional materials that operate at different light wavelengths. An important challenge in developing light-controlled artificial molecular machines lies in attaining a detailed understanding of the photoisomerization-coupled conformational changes that occur in macromolecules and molecular assemblies. In this issue of ACS Nano, Bléger, Rabe, and co-workers use force microscopy to provide interesting insights into the behavior of individual photoresponsive molecules and to identify contraction, extension, and crawling events accompanying light-induced isomerization."}],"_id":"13399","date_published":"2014-12-23T00:00:00Z","publication_identifier":{"eissn":["1936-086X"],"issn":["1936-0851"]},"scopus_import":"1","external_id":{"pmid":["25474733"]},"date_updated":"2023-08-08T07:18:58Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","year":"2014","oa_version":"None","article_type":"original"},{"extern":"1","month":"04","date_created":"2023-08-01T09:46:27Z","publisher":"Springer Nature","quality_controlled":"1","publication":"Nature Communications","intvolume":" 5","status":"public","citation":{"mla":"Kundu, Pintu K., et al. “Nanoporous Frameworks Exhibiting Multiple Stimuli Responsiveness.” Nature Communications, vol. 5, 3588, Springer Nature, 2014, doi:10.1038/ncomms4588.","chicago":"Kundu, Pintu K., Gregory L. Olsen, Vladimir Kiss, and Rafal Klajn. “Nanoporous Frameworks Exhibiting Multiple Stimuli Responsiveness.” Nature Communications. Springer Nature, 2014. https://doi.org/10.1038/ncomms4588.","ista":"Kundu PK, Olsen GL, Kiss V, Klajn R. 2014. Nanoporous frameworks exhibiting multiple stimuli responsiveness. Nature Communications. 5, 3588.","ieee":"P. K. Kundu, G. L. Olsen, V. Kiss, and R. Klajn, “Nanoporous frameworks exhibiting multiple stimuli responsiveness,” Nature Communications, vol. 5. Springer Nature, 2014.","ama":"Kundu PK, Olsen GL, Kiss V, Klajn R. Nanoporous frameworks exhibiting multiple stimuli responsiveness. Nature Communications. 2014;5. doi:10.1038/ncomms4588","apa":"Kundu, P. K., Olsen, G. L., Kiss, V., & Klajn, R. (2014). Nanoporous frameworks exhibiting multiple stimuli responsiveness. Nature Communications. Springer Nature. https://doi.org/10.1038/ncomms4588","short":"P.K. Kundu, G.L. Olsen, V. Kiss, R. Klajn, Nature Communications 5 (2014)."},"title":"Nanoporous frameworks exhibiting multiple stimuli responsiveness","day":"07","type":"journal_article","author":[{"full_name":"Kundu, Pintu K.","first_name":"Pintu K.","last_name":"Kundu"},{"last_name":"Olsen","full_name":"Olsen, Gregory L.","first_name":"Gregory L."},{"full_name":"Kiss, Vladimir","first_name":"Vladimir","last_name":"Kiss"},{"full_name":"Klajn, Rafal","first_name":"Rafal","last_name":"Klajn","id":"8e84690e-1e48-11ed-a02b-a1e6fb8bb53b"}],"pmid":1,"language":[{"iso":"eng"}],"keyword":["General Physics and Astronomy","General Biochemistry","Genetics and Molecular Biology","General Chemistry","Multidisciplinary"],"doi":"10.1038/ncomms4588","article_processing_charge":"No","article_number":"3588","date_published":"2014-04-07T00:00:00Z","_id":"13402","abstract":[{"text":"Nanoporous frameworks are polymeric materials built from rigid molecules, which give rise to their nanoporous structures with applications in gas sorption and storage, catalysis and others. Conceptually new applications could emerge, should these beneficial properties be manipulated by external stimuli in a reversible manner. One approach to render nanoporous frameworks responsive to external signals would be to immobilize molecular switches within their nanopores. Although the majority of molecular switches require conformational freedom to isomerize, and switching in the solid state is prohibited, the nanopores may provide enough room for the switches to efficiently isomerize. Here we describe two families of nanoporous materials incorporating the spiropyran molecular switch. These materials exhibit a variety of interesting properties, including reversible photochromism and acidochromism under solvent-free conditions, light-controlled capture and release of metal ions, as well reversible chromism induced by solvation/desolvation.","lang":"eng"}],"publication_status":"published","main_file_link":[{"open_access":"1","url":"https://doi.org/10.1038/ncomms4588"}],"oa":1,"volume":5,"article_type":"original","year":"2014","oa_version":"Published Version","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","date_updated":"2023-08-08T07:28:10Z","scopus_import":"1","external_id":{"pmid":["24709950"]},"publication_identifier":{"eissn":["2041-1723"]}},{"_id":"14019","date_published":"2014-08-14T00:00:00Z","abstract":[{"text":"The cyclopropene radical cation (c-C3H₄⁺) is an important but poorly characterized three-membered-ring hydrocarbon. We report on a measurement of the high-resolution photoelectron and photoionization spectra of cyclopropene and several deuterated isotopomers, from which we have determined the rovibrational energy level structure of the X⁺ (2)B2 ground electronic state of c-C3H₄⁺ at low energies for the first time. The synthesis of the partially deuterated isotopomers always resulted in mixtures of several isotopomers, differing in their number of D atoms and in the location of these atoms, so that the photoelectron spectra of deuterated samples are superpositions of the spectra of several isotopomers. The rotationally resolved spectra indicate a C(2v)-symmetric R0 structure for the ground electronic state of c-C3H₄⁺. Two vibrational modes of c-C3H₄⁺ are found to have vibrational wave numbers below 300 cm(-1), which is surprising for such a small cyclic hydrocarbon. The analysis of the isotopic shifts of the vibrational levels enabled the assignment of the lowest-frequency mode (fundamental wave number of ≈110 cm(-1) in c-C3H₄⁺) to the CH2 torsional mode (ν₈⁺, A2 symmetry) and of the second-lowest-frequency mode (≈210 cm(-1) in c-C3H₄⁺) to a mode combining a CH out-of-plane with a CH2 rocking motion (ν₁₅⁺, B2 symmetry). The potential energy along the CH2 torsional coordinate is flat near the equilibrium structure and leads to a pronounced anharmonicity.","lang":"eng"}],"article_number":"064317","article_processing_charge":"No","issue":"6","volume":141,"publication_status":"published","year":"2014","oa_version":"None","article_type":"original","publication_identifier":{"eissn":["1089-7690"],"issn":["0021-9606"]},"external_id":{"pmid":["25134581"]},"scopus_import":"1","date_updated":"2023-08-22T09:01:31Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","date_created":"2023-08-10T06:38:30Z","month":"08","extern":"1","status":"public","intvolume":" 141","publication":"The Journal of Chemical Physics","quality_controlled":"1","publisher":"AIP Publishing","author":[{"first_name":"K.","full_name":"Vasilatou, K.","last_name":"Vasilatou"},{"last_name":"Michaud","full_name":"Michaud, J. M.","first_name":"J. M."},{"id":"71b4d059-2a03-11ee-914d-dfa3beed6530","last_name":"Baykusheva","full_name":"Baykusheva, Denitsa Rangelova","first_name":"Denitsa Rangelova"},{"full_name":"Grassi, G.","first_name":"G.","last_name":"Grassi"},{"first_name":"F.","full_name":"Merkt, F.","last_name":"Merkt"}],"type":"journal_article","day":"14","title":"The cyclopropene radical cation: Rovibrational level structure at low energies from high-resolution photoelectron spectra","citation":{"short":"K. Vasilatou, J.M. Michaud, D.R. Baykusheva, G. Grassi, F. Merkt, The Journal of Chemical Physics 141 (2014).","apa":"Vasilatou, K., Michaud, J. M., Baykusheva, D. R., Grassi, G., & Merkt, F. (2014). The cyclopropene radical cation: Rovibrational level structure at low energies from high-resolution photoelectron spectra. The Journal of Chemical Physics. AIP Publishing. https://doi.org/10.1063/1.4890744","ama":"Vasilatou K, Michaud JM, Baykusheva DR, Grassi G, Merkt F. The cyclopropene radical cation: Rovibrational level structure at low energies from high-resolution photoelectron spectra. The Journal of Chemical Physics. 2014;141(6). doi:10.1063/1.4890744","ista":"Vasilatou K, Michaud JM, Baykusheva DR, Grassi G, Merkt F. 2014. The cyclopropene radical cation: Rovibrational level structure at low energies from high-resolution photoelectron spectra. The Journal of Chemical Physics. 141(6), 064317.","ieee":"K. Vasilatou, J. M. Michaud, D. R. Baykusheva, G. Grassi, and F. Merkt, “The cyclopropene radical cation: Rovibrational level structure at low energies from high-resolution photoelectron spectra,” The Journal of Chemical Physics, vol. 141, no. 6. AIP Publishing, 2014.","chicago":"Vasilatou, K., J. M. Michaud, Denitsa Rangelova Baykusheva, G. Grassi, and F. Merkt. “The Cyclopropene Radical Cation: Rovibrational Level Structure at Low Energies from High-Resolution Photoelectron Spectra.” The Journal of Chemical Physics. AIP Publishing, 2014. https://doi.org/10.1063/1.4890744.","mla":"Vasilatou, K., et al. “The Cyclopropene Radical Cation: Rovibrational Level Structure at Low Energies from High-Resolution Photoelectron Spectra.” The Journal of Chemical Physics, vol. 141, no. 6, 064317, AIP Publishing, 2014, doi:10.1063/1.4890744."},"doi":"10.1063/1.4890744","keyword":["Physical and Theoretical Chemistry","General Physics and Astronomy"],"language":[{"iso":"eng"}],"pmid":1},{"publication_identifier":{"issn":["0031-9007"],"eissn":["1079-7114"]},"date_updated":"2023-08-22T09:02:56Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","scopus_import":"1","external_id":{"arxiv":["1311.3923"],"pmid":["25062172"]},"oa_version":"Preprint","year":"2014","article_type":"original","oa":1,"main_file_link":[{"url":"https://arxiv.org/abs/1311.3923","open_access":"1"}],"publication_status":"published","volume":113,"issue":"2","article_processing_charge":"No","arxiv":1,"_id":"14020","date_published":"2014-07-11T00:00:00Z","abstract":[{"text":"We report the observation of macroscopic field-free orientation, i.e., more than 73% of CO molecules pointing in the same direction. This is achieved through an all-optical scheme operating at high particle densities (>10(17) cm(-3)) that combines one-color (ω) and two-color (ω+2ω) nonresonant femtosecond laser pulses. We show that the achieved orientation solely relies on the hyperpolarizability interaction as opposed to an ionization-depletion mechanism, thus, opening a wide range of applications. The achieved strong orientation enables us to reveal the molecular-frame anisotropies of the photorecombination amplitudes and phases caused by a shape resonance. The resonance appears as a local maximum in the even-harmonic emission around 28 eV. In contrast, the odd-harmonic emission is suppressed in this spectral region through the combined effects of an asymmetric photorecombination phase and a subcycle Stark effect, generic for polar molecules, that we experimentally identify.","lang":"eng"}],"article_number":"023001","pmid":1,"doi":"10.1103/physrevlett.113.023001","language":[{"iso":"eng"}],"keyword":["General Physics and Astronomy"],"title":"Two-pulse field-free orientation reveals anisotropy of molecular shape resonance","citation":{"mla":"Kraus, P. M., et al. “Two-Pulse Field-Free Orientation Reveals Anisotropy of Molecular Shape Resonance.” Physical Review Letters, vol. 113, no. 2, 023001, American Physical Society, 2014, doi:10.1103/physrevlett.113.023001.","chicago":"Kraus, P. M., Denitsa Rangelova Baykusheva, and H. J. Wörner. “Two-Pulse Field-Free Orientation Reveals Anisotropy of Molecular Shape Resonance.” Physical Review Letters. American Physical Society, 2014. https://doi.org/10.1103/physrevlett.113.023001.","ieee":"P. M. Kraus, D. R. Baykusheva, and H. J. Wörner, “Two-pulse field-free orientation reveals anisotropy of molecular shape resonance,” Physical Review Letters, vol. 113, no. 2. American Physical Society, 2014.","ista":"Kraus PM, Baykusheva DR, Wörner HJ. 2014. Two-pulse field-free orientation reveals anisotropy of molecular shape resonance. Physical Review Letters. 113(2), 023001.","ama":"Kraus PM, Baykusheva DR, Wörner HJ. Two-pulse field-free orientation reveals anisotropy of molecular shape resonance. Physical Review Letters. 2014;113(2). doi:10.1103/physrevlett.113.023001","apa":"Kraus, P. M., Baykusheva, D. R., & Wörner, H. J. (2014). Two-pulse field-free orientation reveals anisotropy of molecular shape resonance. Physical Review Letters. American Physical Society. https://doi.org/10.1103/physrevlett.113.023001","short":"P.M. Kraus, D.R. Baykusheva, H.J. Wörner, Physical Review Letters 113 (2014)."},"type":"journal_article","author":[{"last_name":"Kraus","first_name":"P. M.","full_name":"Kraus, P. M."},{"id":"71b4d059-2a03-11ee-914d-dfa3beed6530","last_name":"Baykusheva","first_name":"Denitsa Rangelova","full_name":"Baykusheva, Denitsa Rangelova"},{"full_name":"Wörner, H. J.","first_name":"H. J.","last_name":"Wörner"}],"day":"11","publisher":"American Physical Society","intvolume":" 113","status":"public","quality_controlled":"1","publication":"Physical Review Letters","date_created":"2023-08-10T06:38:38Z","extern":"1","month":"07"}]