---
_id: '11606'
abstract:
- lang: eng
text: "Context. Our knowledge of the dynamics of stars has undergone a revolution
through the simultaneous large amount of high-quality photometric observations
collected by space-based asteroseismology and ground-based high-precision spectropolarimetry.
They allowed us to probe the internal rotation of stars and their surface magnetism
in the whole Hertzsprung-Russell diagram. However, new methods should still be
developed to probe the deep magnetic fields in these stars.\r\n\r\nAims. Our goal
is to provide seismic diagnoses that allow us to probe the internal magnetism
of stars.\r\n\r\nMethods. We focused on asymptotic low-frequency gravity modes
and high-frequency acoustic modes. Using a first-order perturbative theory, we
derived magnetic splittings of their frequencies as explicit functions of stellar
parameters.\r\n\r\nResults. As in the case of rotation, we show that asymptotic
gravity and acoustic modes can allow us to probe the different components of the
magnetic field in the cavities in which they propagate. This again demonstrates
the high potential of using mixed-modes when this is possible."
acknowledgement: The authors thank the referee and Pr. J. Christensen-Dalsgaard for
their very constructive comments and remarks that allowed us to improve the article.
St. M., L. B., V. P., and K. A. acknowledge support from the European Research Council
through ERC grant SPIRE 647383. All the members from CEA acknowledge support from
GOLF and PLATO CNES grants of the Astrophysics Division at CEA. S. Mathur acknowledges
support by the Ramon y Cajal fellowship number RYC-2015-17697. We made great use
of the megyr python package for interfacing MESA and GYRE codes.
article_number: A122
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: S.
full_name: Mathis, S.
last_name: Mathis
- first_name: Lisa Annabelle
full_name: Bugnet, Lisa Annabelle
id: d9edb345-f866-11ec-9b37-d119b5234501
last_name: Bugnet
orcid: 0000-0003-0142-4000
- first_name: V.
full_name: Prat, V.
last_name: Prat
- first_name: K.
full_name: Augustson, K.
last_name: Augustson
- first_name: S.
full_name: Mathur, S.
last_name: Mathur
- first_name: R. A.
full_name: Garcia, R. A.
last_name: Garcia
citation:
ama: Mathis S, Bugnet LA, Prat V, Augustson K, Mathur S, Garcia RA. Probing the
internal magnetism of stars using asymptotic magneto-asteroseismology. Astronomy
& Astrophysics. 2021;647. doi:10.1051/0004-6361/202039180
apa: Mathis, S., Bugnet, L. A., Prat, V., Augustson, K., Mathur, S., & Garcia,
R. A. (2021). Probing the internal magnetism of stars using asymptotic magneto-asteroseismology.
Astronomy & Astrophysics. EDP Sciences. https://doi.org/10.1051/0004-6361/202039180
chicago: Mathis, S., Lisa Annabelle Bugnet, V. Prat, K. Augustson, S. Mathur, and
R. A. Garcia. “Probing the Internal Magnetism of Stars Using Asymptotic Magneto-Asteroseismology.”
Astronomy & Astrophysics. EDP Sciences, 2021. https://doi.org/10.1051/0004-6361/202039180.
ieee: S. Mathis, L. A. Bugnet, V. Prat, K. Augustson, S. Mathur, and R. A. Garcia,
“Probing the internal magnetism of stars using asymptotic magneto-asteroseismology,”
Astronomy & Astrophysics, vol. 647. EDP Sciences, 2021.
ista: Mathis S, Bugnet LA, Prat V, Augustson K, Mathur S, Garcia RA. 2021. Probing
the internal magnetism of stars using asymptotic magneto-asteroseismology. Astronomy
& Astrophysics. 647, A122.
mla: Mathis, S., et al. “Probing the Internal Magnetism of Stars Using Asymptotic
Magneto-Asteroseismology.” Astronomy & Astrophysics, vol. 647, A122,
EDP Sciences, 2021, doi:10.1051/0004-6361/202039180.
short: S. Mathis, L.A. Bugnet, V. Prat, K. Augustson, S. Mathur, R.A. Garcia, Astronomy
& Astrophysics 647 (2021).
date_created: 2022-07-18T12:15:27Z
date_published: 2021-03-18T00:00:00Z
date_updated: 2022-08-19T10:11:52Z
day: '18'
doi: 10.1051/0004-6361/202039180
extern: '1'
external_id:
arxiv:
- '2012.11050'
intvolume: ' 647'
keyword:
- Space and Planetary Science
- Astronomy and Astrophysics
- asteroseismology / waves / stars
- magnetic field / stars
- oscillations / methods
- analytical
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/2012.11050
month: '03'
oa: 1
oa_version: Preprint
publication: Astronomy & Astrophysics
publication_identifier:
eissn:
- 1432-0746
issn:
- 0004-6361
publication_status: published
publisher: EDP Sciences
quality_controlled: '1'
scopus_import: '1'
status: public
title: Probing the internal magnetism of stars using asymptotic magneto-asteroseismology
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 647
year: '2021'
...
---
_id: '12940'
abstract:
- lang: eng
text: Desorption electrospray ionization (DESI), easy ambient sonic-spray ionization
(EASI) and low-temperature plasma (LTP) ionization are powerful ambient ionization
techniques for mass spectrometry. However, every single method has its limitation
in terms of polarity and molecular weight of analyte molecules. After the miniaturization
of every possible component of the different ion sources, we finally were able
to embed two emitters and an ion transfer tubing into a small, hand-held device.
The pen-like interface is connected to the mass spectrometer and a separate control
unit via a bundle of flexible tubing and cables. The novel device allows the user
to ionize an extended range of chemicals by simple switching between DESI, voltage-free
EASI, or LTP ionization as well as to freely move the interface over a surface
of interest. A mini camera, which is mounted on the tip of the pen, magnifies
the desorption area and enables a simple positioning of the pen. The interface
was successfully tested using different types of chemicals, pharmaceuticals, and
real life samples. Moreover, the combination of optical data from the camera module
and chemical data obtained by mass analysis facilitates a novel type of imaging
mass spectrometry, which we name “interactive mass spectrometry imaging (IMSI)”.
article_processing_charge: No
article_type: letter_note
author:
- first_name: Christina
full_name: Meisenbichler, Christina
last_name: Meisenbichler
- first_name: Florian
full_name: Kluibenschedl, Florian
id: 7499e70e-eb2c-11ec-b98b-f925648bc9d9
last_name: Kluibenschedl
- first_name: Thomas
full_name: Müller, Thomas
last_name: Müller
citation:
ama: Meisenbichler C, Kluibenschedl F, Müller T. A 3-in-1 hand-held ambient mass
spectrometry interface for identification and 2D localization of chemicals on
surfaces. Analytical Chemistry. 2020;92(21):14314-14318. doi:10.1021/acs.analchem.0c02615
apa: Meisenbichler, C., Kluibenschedl, F., & Müller, T. (2020). A 3-in-1 hand-held
ambient mass spectrometry interface for identification and 2D localization of
chemicals on surfaces. Analytical Chemistry. American Chemical Society.
https://doi.org/10.1021/acs.analchem.0c02615
chicago: Meisenbichler, Christina, Florian Kluibenschedl, and Thomas Müller. “A
3-in-1 Hand-Held Ambient Mass Spectrometry Interface for Identification and 2D
Localization of Chemicals on Surfaces.” Analytical Chemistry. American
Chemical Society, 2020. https://doi.org/10.1021/acs.analchem.0c02615.
ieee: C. Meisenbichler, F. Kluibenschedl, and T. Müller, “A 3-in-1 hand-held ambient
mass spectrometry interface for identification and 2D localization of chemicals
on surfaces,” Analytical Chemistry, vol. 92, no. 21. American Chemical
Society, pp. 14314–14318, 2020.
ista: Meisenbichler C, Kluibenschedl F, Müller T. 2020. A 3-in-1 hand-held ambient
mass spectrometry interface for identification and 2D localization of chemicals
on surfaces. Analytical Chemistry. 92(21), 14314–14318.
mla: Meisenbichler, Christina, et al. “A 3-in-1 Hand-Held Ambient Mass Spectrometry
Interface for Identification and 2D Localization of Chemicals on Surfaces.” Analytical
Chemistry, vol. 92, no. 21, American Chemical Society, 2020, pp. 14314–18,
doi:10.1021/acs.analchem.0c02615.
short: C. Meisenbichler, F. Kluibenschedl, T. Müller, Analytical Chemistry 92 (2020)
14314–14318.
date_created: 2023-05-10T14:50:19Z
date_published: 2020-10-16T00:00:00Z
date_updated: 2023-05-15T08:01:20Z
day: '16'
doi: 10.1021/acs.analchem.0c02615
extern: '1'
external_id:
pmid:
- '33063994'
intvolume: ' 92'
issue: '21'
keyword:
- Analytical Chemistry
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1021/acs.analchem.0c02615
month: '10'
oa: 1
oa_version: Published Version
page: 14314-14318
pmid: 1
publication: Analytical Chemistry
publication_identifier:
issn:
- 0003-2700
- 1520-6882
publication_status: published
publisher: American Chemical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: A 3-in-1 hand-held ambient mass spectrometry interface for identification and
2D localization of chemicals on surfaces
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 92
year: '2020'
...
---
_id: '13383'
abstract:
- lang: eng
text: Two novel donor–acceptor Stenhouse adducts (DASAs) featuring the catechol
moiety were synthesized and characterized. Both compounds bind strongly to the
surfaces of magnetite nanoparticles. An adrenaline-derived DASA renders the particles
insoluble in all common solvents, likely because of poor solvation of the zwitterionic
isomer generated on the nanoparticle surfaces. Well-soluble nanoparticles were
successfully obtained using dopamine-derived DASA equipped with a long alkyl chain.
Upon its attachment to nanoparticles, this DASA undergoes an irreversible decoloration
reaction owing to the formation of the zwitterionic form. The reaction follows
first-order kinetics and proceeds more rapidly on large nanoparticles. Interestingly,
decoloration can be suppressed in the presence of free DASA molecules in solution
or at high nanoparticle concentrations.
article_processing_charge: No
article_type: original
author:
- first_name: Johannes
full_name: Ahrens, Johannes
last_name: Ahrens
- first_name: Tong
full_name: Bian, Tong
last_name: Bian
- first_name: Tom
full_name: Vexler, Tom
last_name: Vexler
- first_name: Rafal
full_name: Klajn, Rafal
id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b
last_name: Klajn
citation:
ama: Ahrens J, Bian T, Vexler T, Klajn R. Irreversible bleaching of donor-acceptor
stenhouse adducts on the surfaces of magnetite nanoparticles. ChemPhotoChem.
2017;1(5):230-236. doi:10.1002/cptc.201700009
apa: Ahrens, J., Bian, T., Vexler, T., & Klajn, R. (2017). Irreversible bleaching
of donor-acceptor stenhouse adducts on the surfaces of magnetite nanoparticles.
ChemPhotoChem. Wiley. https://doi.org/10.1002/cptc.201700009
chicago: Ahrens, Johannes, Tong Bian, Tom Vexler, and Rafal Klajn. “Irreversible
Bleaching of Donor-Acceptor Stenhouse Adducts on the Surfaces of Magnetite Nanoparticles.”
ChemPhotoChem. Wiley, 2017. https://doi.org/10.1002/cptc.201700009.
ieee: J. Ahrens, T. Bian, T. Vexler, and R. Klajn, “Irreversible bleaching of donor-acceptor
stenhouse adducts on the surfaces of magnetite nanoparticles,” ChemPhotoChem,
vol. 1, no. 5. Wiley, pp. 230–236, 2017.
ista: Ahrens J, Bian T, Vexler T, Klajn R. 2017. Irreversible bleaching of donor-acceptor
stenhouse adducts on the surfaces of magnetite nanoparticles. ChemPhotoChem. 1(5),
230–236.
mla: Ahrens, Johannes, et al. “Irreversible Bleaching of Donor-Acceptor Stenhouse
Adducts on the Surfaces of Magnetite Nanoparticles.” ChemPhotoChem, vol.
1, no. 5, Wiley, 2017, pp. 230–36, doi:10.1002/cptc.201700009.
short: J. Ahrens, T. Bian, T. Vexler, R. Klajn, ChemPhotoChem 1 (2017) 230–236.
date_created: 2023-08-01T09:41:43Z
date_published: 2017-05-01T00:00:00Z
date_updated: 2023-08-07T12:08:05Z
day: '01'
doi: 10.1002/cptc.201700009
extern: '1'
intvolume: ' 1'
issue: '5'
keyword:
- Organic Chemistry
- Physical and Theoretical Chemistry
- Analytical Chemistry
language:
- iso: eng
month: '05'
oa_version: None
page: 230-236
publication: ChemPhotoChem
publication_identifier:
eissn:
- 2367-0932
publication_status: published
publisher: Wiley
quality_controlled: '1'
scopus_import: '1'
status: public
title: Irreversible bleaching of donor-acceptor stenhouse adducts on the surfaces
of magnetite nanoparticles
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 1
year: '2017'
...