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

Kochukhov, O.; Heiter, U.; Piskunov, N.; Ryde, Nils LU ; Gustafsson, B.; Bagnulo, S. and Plez, B. (2009) Cool stars, stellar systems and the sun. Proceedings of the 15th Cambridge Workshop In AIP Conference Proceedings 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
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
AIP Conference Proceedings
volume
1094
pages
124 - 129
publisher
American Institute of Physics
conference name
Cool stars, stellar systems and the sun. Proceedings of the 15th Cambridge Workshop
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
2009-08-05 14:46:01
date last changed
2016-10-13 04:40:55
@misc{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.},
  isbn         = {978-0-7354-0627-8},
  language     = {eng},
  pages        = {124--129},
  publisher    = {ARRAY(0x884eb10)},
  series       = {AIP Conference Proceedings},
  title        = {Magnetic fields in M dwarf stars from high-resolution infrared spectra},
  url          = {http://dx.doi.org/10.1063/1.3099081},
  volume       = {1094},
  year         = {2009},
}