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Magnetic fields in M dwarf stars from high-resolution infrared spectra

Kochukhov, O. ; Heiter, U. ; Piskunov, N. ; Ryde, Nils LU orcid ; Gustafsson, B. ; Bagnulo, S. and Plez, B. (2009) Cool stars, stellar systems and the sun. Proceedings of the 15th Cambridge Workshop 1094. p.124-129
Abstract
Magnetic fields play a central role in the atmospheric properties and variability of active M dwarfs. Information on the strength and structure of magnetic fields in these objects is vital for understanding dynamo mechanisms and magnetically-driven activity of low-mass stars, and for constraining theories of star formation and evolution. We have initiated the first systematic high-resolution survey of magnetically sensitive infrared spectral lines in M dwarf stars using the CRIRES instrument at the ESO VLT. We have completed observations for a sample of 35 active and inactive M dwarfs. Here we report first results of our project, demonstrating a clear detection of magnetic splitting of lines in the spectra of several M dwarfs. We assess... (More)
Magnetic fields play a central role in the atmospheric properties and variability of active M dwarfs. Information on the strength and structure of magnetic fields in these objects is vital for understanding dynamo mechanisms and magnetically-driven activity of low-mass stars, and for constraining theories of star formation and evolution. We have initiated the first systematic high-resolution survey of magnetically sensitive infrared spectral lines in M dwarf stars using the CRIRES instrument at the ESO VLT. We have completed observations for a sample of 35 active and inactive M dwarfs. Here we report first results of our project, demonstrating a clear detection of magnetic splitting of lines in the spectra of several M dwarfs. We assess diagnostic potential of different Zeeman-sensitive lines in the observed spectral region and apply spectrum synthesis modelling to infer magnetic field properties of selected M dwarfs. (Less)
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author
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organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
AIP Conference Proceedings
volume
1094
pages
124 - 129
publisher
American Institute of Physics (AIP)
conference name
Cool stars, stellar systems and the sun. Proceedings of the 15th Cambridge Workshop
conference dates
2008-07-21 - 2008-07-25
external identifiers
  • wos:000264752500016
  • scopus:64849083363
ISBN
978-0-7354-0627-8
DOI
10.1063/1.3099081
language
English
LU publication?
yes
id
fdb49d21-1b6d-4a43-b2c8-46dedd02faa1 (old id 1454174)
date added to LUP
2016-04-04 10:36:38
date last changed
2024-01-12 20:58:04
@inproceedings{fdb49d21-1b6d-4a43-b2c8-46dedd02faa1,
  abstract     = {{Magnetic fields play a central role in the atmospheric properties and variability of active M dwarfs. Information on the strength and structure of magnetic fields in these objects is vital for understanding dynamo mechanisms and magnetically-driven activity of low-mass stars, and for constraining theories of star formation and evolution. We have initiated the first systematic high-resolution survey of magnetically sensitive infrared spectral lines in M dwarf stars using the CRIRES instrument at the ESO VLT. We have completed observations for a sample of 35 active and inactive M dwarfs. Here we report first results of our project, demonstrating a clear detection of magnetic splitting of lines in the spectra of several M dwarfs. We assess diagnostic potential of different Zeeman-sensitive lines in the observed spectral region and apply spectrum synthesis modelling to infer magnetic field properties of selected M dwarfs.}},
  author       = {{Kochukhov, O. and Heiter, U. and Piskunov, N. and Ryde, Nils and Gustafsson, B. and Bagnulo, S. and Plez, B.}},
  booktitle    = {{AIP Conference Proceedings}},
  isbn         = {{978-0-7354-0627-8}},
  language     = {{eng}},
  pages        = {{124--129}},
  publisher    = {{American Institute of Physics (AIP)}},
  title        = {{Magnetic fields in M dwarf stars from high-resolution infrared spectra}},
  url          = {{http://dx.doi.org/10.1063/1.3099081}},
  doi          = {{10.1063/1.3099081}},
  volume       = {{1094}},
  year         = {{2009}},
}