English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
  Magnetic fields in M dwarfs from the CARMENES survey

Shulyak, D., Reiners, A., Nagel, E., Tal-Or, L., Caballero, J. A., Zechmeister, M., et al. (2019). Magnetic fields in M dwarfs from the CARMENES survey. Astronomy and Astrophysics, 626: A86. doi:10.1051/0004-6361/201935315.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/21.11116/0000-0006-5C1E-3 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-5C1F-2
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Shulyak, Denis1, Author              
Reiners, A., Author
Nagel, E., Author
Tal-Or, L., Author
Caballero, J. A., Author
Zechmeister, M., Author
Béjar, V. J. S., Author
Cortés-Contreras, M., Author
Martin, E. L., Author
Kaminski, A., Author
Ribas, I., Author
Quirrenbach, A., Author
Amado, P. J., Author
Anglada-Escudé, G., Author
Bauer, F. F., Author
Dreizler, S., Author
Guenther, E. W., Author
Henning, T., Author
Jeffers, S. V., Author
Kürster, M., Author
Lafarga, M., AuthorMontes, D., AuthorMorales, J. C., AuthorPedraz, S., Author more..
Affiliations:
1Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832288              

Content

show
hide
Free keywords: -
 Abstract: Context. M dwarfs are known to generate the strongest magnetic fields among main-sequence stars with convective envelopes, but we are still lacking a consistent picture of the link between the magnetic fields and underlying dynamo mechanisms, rotation, and activity. Aims. In this work we aim to measure magnetic fields from the high-resolution near-infrared spectra taken with the CARMENES radial-velocity planet survey in a sample of 29 active M dwarfs and compare our results against stellar parameters. Methods. We used the state-of-the-art radiative transfer code to measure total magnetic flux densities from the Zeeman broadening of spectral lines and filling factors. Results. We detect strong kG magnetic fields in all our targets. In 16 stars the magnetic fields were measured for the first time. Our measurements are consistent with the magnetic field saturation in stars with rotation periods P < 4 d. The analysis of the magnetic filling factors reveal two different patterns of either very smooth distribution or a more patchy one, which can be connected to the dynamo state of the stars and/or stellar mass. Conclusions. Our measurements extend the list of M dwarfs with strong surface magnetic fields. They also allow us to better constrain the interplay between the magnetic energy, stellar rotation, and underlying dynamo action. The high spectral resolution and observations at near-infrared wavelengths are the beneficial capabilities of the CARMENES instrument that allow us to address important questions about the stellar magnetism.

Details

show
hide
Language(s): eng - English
 Dates: 2019
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1051/0004-6361/201935315
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Astronomy and Astrophysics
  Other : Astron. Astrophys.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Les Ulis Cedex A France : EDP Sciences
Pages: - Volume / Issue: 626 Sequence Number: A86 Start / End Page: - Identifier: Other: 1432-0746
ISSN: 0004-6361
CoNE: https://pure.mpg.de/cone/journals/resource/954922828219_1