{"status":"public","related_material":{"link":[{"relation":"erratum","url":"https://doi.org/10.1093/mnras/staa2668"}]},"quality_controlled":"1","title":"MUSEQuBES: Calibrating the redshifts of Lyα emitters using stacked circumgalactic medium absorption profiles","scopus_import":"1","publisher":"Oxford University Press","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","date_created":"2022-07-07T10:20:11Z","oa_version":"Preprint","oa":1,"abstract":[{"text":"Ly α emission lines are typically found to be redshifted with respect to the systemic redshifts of galaxies, likely due to resonant scattering of Ly α photons. Here, we measure the average velocity offset for a sample of 96 z ≈ 3.3 Ly α emitters (LAEs) with a median Ly α flux (luminosity) of ≈10−17 erg cm−2 s−1 (⁠≈1042 erg s−1⁠) and a median star formation rate (SFR) of ≈1.3 M⊙ yr−1 (not corrected for possible dust extinction), detected by the Multi-Unit Spectroscopic Explorer as part of our MUSEQuBES circumgalactic medium (CGM) survey. By postulating that the stacked CGM absorption profiles of these LAEs, probed by eight background quasars, must be centred on the systemic redshift, we measure an average velocity offset, Voffset = 171\\pm 8 km s−1, between the Ly α emission peak and the systemic redshift. The observed Voffset is lower by factors of ≈1.4 and ≈2.6 compared to the velocity offsets measured for narrow-band-selected LAEs and Lyman break galaxies, respectively, which probe galaxies with higher masses and SFRs. Consistent with earlier studies based on direct measurements for individual objects, we find that the Voffset is correlated with the full width at half-maximum of the red peak of the Ly α line, and anticorrelated with the rest-frame equivalent width. Moreover, we find that Voffset is correlated with SFR with a sub-linear scaling relation, Voffset∝SFR0.16±0.03⁠. Adopting the mass scaling for main-sequence galaxies, such a relation suggests that Voffset scales with the circular velocity of the dark matter haloes hosting the LAEs.","lang":"eng"}],"main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/1910.03593"}],"issue":"2","publication_status":"published","extern":"1","date_published":"2020-08-01T00:00:00Z","date_updated":"2022-08-18T11:00:24Z","month":"08","article_processing_charge":"No","day":"01","type":"journal_article","keyword":["Space and Planetary Science","Astronomy and Astrophysics","galaxies: haloes","galaxies: high-redshift","quasars: absorption lines"],"acknowledgement":"We thank the anonymous referee for useful suggestions. This study is based on observations collected at the European Organisation for Astronomical Research in the Southern Hemisphere under ESO programme(s): 094.A-0131(B), 095.A 0200(A), 096.A0222(A), 097.A-0089(A), and 099.A-0159(A). SM acknowledges support from the Alexander von Humboldt Foundation, Germany. SM thanks Christian Herenz for useful discussion. SC gratefully acknowledges support from Swiss National Science Foundation grant PP00P2 163824. JB acknowledges support by FCT/MCTES through national funds by grant UID/FIS/04434/2019 and through Investigador FCT Contract No. IF/01654/2014/CP1215/CT0003. NB and JZ acknowledge support from ANR grant ANR-17-CE31- 0017 (3DGasFlows). AC and JR acknowledge support from the ERC starting grant 336736-CALENDS. MA acknowledges support from European Union’s H2020 Marie Skłodowska-Curie Actions grant 721463 to the SUNDIAL ITN, and from the Spanish Ministry of Economy and Competitiveness (MINECO) under grant number AYA2016-76219-P. MA also acknowledges support from the Fundacion BBVA under its 2017 programme of assistance to ´scientific research groups, for the project ‘Using machine-learning techniques to drag galaxies from the noise in deep imaging’. FL and AV acknowledge support from the ERC starting grant ERC757258-TRIPLE.","year":"2020","volume":496,"intvolume":"       496","_id":"11528","language":[{"iso":"eng"}],"article_type":"original","citation":{"ama":"Muzahid S, Schaye J, Marino RA, et al. MUSEQuBES: Calibrating the redshifts of Lyα emitters using stacked circumgalactic medium absorption profiles. <i>Monthly Notices of the Royal Astronomical Society</i>. 2020;496(2):1013-1022. doi:<a href=\"https://doi.org/10.1093/mnras/staa1347\">10.1093/mnras/staa1347</a>","ista":"Muzahid S, Schaye J, Marino RA, Cantalupo S, Brinchmann J, Contini T, Wendt M, Wisotzki L, Zabl J, Bouché N, Akhlaghi M, Chen H-W, Claeyssens A, Johnson S, Leclercq F, Maseda M, Matthee JJ, Richard J, Urrutia T, Verhamme A. 2020. MUSEQuBES: Calibrating the redshifts of Lyα emitters using stacked circumgalactic medium absorption profiles. Monthly Notices of the Royal Astronomical Society. 496(2), 1013–1022.","apa":"Muzahid, S., Schaye, J., Marino, R. A., Cantalupo, S., Brinchmann, J., Contini, T., … Verhamme, A. (2020). MUSEQuBES: Calibrating the redshifts of Lyα emitters using stacked circumgalactic medium absorption profiles. <i>Monthly Notices of the Royal Astronomical Society</i>. Oxford University Press. <a href=\"https://doi.org/10.1093/mnras/staa1347\">https://doi.org/10.1093/mnras/staa1347</a>","chicago":"Muzahid, Sowgat, Joop Schaye, Raffaella Anna Marino, Sebastiano Cantalupo, Jarle Brinchmann, Thierry Contini, Martin Wendt, et al. “MUSEQuBES: Calibrating the Redshifts of Lyα Emitters Using Stacked Circumgalactic Medium Absorption Profiles.” <i>Monthly Notices of the Royal Astronomical Society</i>. Oxford University Press, 2020. <a href=\"https://doi.org/10.1093/mnras/staa1347\">https://doi.org/10.1093/mnras/staa1347</a>.","short":"S. Muzahid, J. Schaye, R.A. Marino, S. Cantalupo, J. Brinchmann, T. Contini, M. Wendt, L. Wisotzki, J. Zabl, N. Bouché, M. Akhlaghi, H.-W. Chen, A. Claeyssens, S. Johnson, F. Leclercq, M. Maseda, J.J. Matthee, J. Richard, T. Urrutia, A. Verhamme, Monthly Notices of the Royal Astronomical Society 496 (2020) 1013–1022.","mla":"Muzahid, Sowgat, et al. “MUSEQuBES: Calibrating the Redshifts of Lyα Emitters Using Stacked Circumgalactic Medium Absorption Profiles.” <i>Monthly Notices of the Royal Astronomical Society</i>, vol. 496, no. 2, Oxford University Press, 2020, pp. 1013–22, doi:<a href=\"https://doi.org/10.1093/mnras/staa1347\">10.1093/mnras/staa1347</a>.","ieee":"S. Muzahid <i>et al.</i>, “MUSEQuBES: Calibrating the redshifts of Lyα emitters using stacked circumgalactic medium absorption profiles,” <i>Monthly Notices of the Royal Astronomical Society</i>, vol. 496, no. 2. Oxford University Press, pp. 1013–1022, 2020."},"publication_identifier":{"eissn":["1365-2966"],"issn":["0035-8711"]},"external_id":{"arxiv":["1910.03593"]},"author":[{"first_name":"Sowgat","last_name":"Muzahid","full_name":"Muzahid, Sowgat"},{"first_name":"Joop","last_name":"Schaye","full_name":"Schaye, Joop"},{"first_name":"Raffaella Anna","last_name":"Marino","full_name":"Marino, Raffaella Anna"},{"full_name":"Cantalupo, Sebastiano","last_name":"Cantalupo","first_name":"Sebastiano"},{"full_name":"Brinchmann, Jarle","first_name":"Jarle","last_name":"Brinchmann"},{"last_name":"Contini","first_name":"Thierry","full_name":"Contini, Thierry"},{"first_name":"Martin","last_name":"Wendt","full_name":"Wendt, Martin"},{"first_name":"Lutz","last_name":"Wisotzki","full_name":"Wisotzki, Lutz"},{"full_name":"Zabl, Johannes","last_name":"Zabl","first_name":"Johannes"},{"last_name":"Bouché","first_name":"Nicolas","full_name":"Bouché, Nicolas"},{"last_name":"Akhlaghi","first_name":"Mohammad","full_name":"Akhlaghi, Mohammad"},{"last_name":"Chen","first_name":"Hsiao-Wen","full_name":"Chen, Hsiao-Wen"},{"full_name":"Claeyssens, Adélaîde","last_name":"Claeyssens","first_name":"Adélaîde"},{"first_name":"Sean","last_name":"Johnson","full_name":"Johnson, Sean"},{"last_name":"Leclercq","first_name":"Floriane","full_name":"Leclercq, Floriane"},{"full_name":"Maseda, Michael","first_name":"Michael","last_name":"Maseda"},{"full_name":"Matthee, Jorryt J","id":"7439a258-f3c0-11ec-9501-9df22fe06720","first_name":"Jorryt J","last_name":"Matthee","orcid":"0000-0003-2871-127X"},{"last_name":"Richard","first_name":"Johan","full_name":"Richard, Johan"},{"full_name":"Urrutia, Tanya","first_name":"Tanya","last_name":"Urrutia"},{"full_name":"Verhamme, Anne","last_name":"Verhamme","first_name":"Anne"}],"publication":"Monthly Notices of the Royal Astronomical Society","doi":"10.1093/mnras/staa1347","page":"1013-1022"}