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Magnetic geometries of Sun-like stars: exploring the mass-rotation plane

Published online by Cambridge University Press:  01 November 2008

Pascal Petit ,
B. Dintrans ,
M. Aurière ,
C. Catala ,
J.-F. Donati ,
R. Fares ,
T. Gastine ,
F. Lignières ,
A. Morgenthaler  and
J. Morin
...Show all authors
Pascal Petit
Affiliation:
Laboratoire d'Astrophysique de Toulouse-Tarbes, Universit de Toulouse, CNRS, France email: petit@ast.obs-mip.fr, dintrans@ast.obs-mip.fr, auriere@ast.obs-mip.fr, donati@ast.obs-mip.fr, rim.fares@ast.obs-mip.fr, thomas.gastine@ast.obs-mip.fr, francois.lignieres@ast.obs-mip.fr, amorgent@ast.obs-mip.fr, julien.morin@ast.obs-mip.fr, fpaletou@ast.obs-mip.fr, stheado@ast.obs-mip.fr
B. Dintrans
Affiliation:
Laboratoire d'Astrophysique de Toulouse-Tarbes, Universit de Toulouse, CNRS, France email: petit@ast.obs-mip.fr, dintrans@ast.obs-mip.fr, auriere@ast.obs-mip.fr, donati@ast.obs-mip.fr, rim.fares@ast.obs-mip.fr, thomas.gastine@ast.obs-mip.fr, francois.lignieres@ast.obs-mip.fr, amorgent@ast.obs-mip.fr, julien.morin@ast.obs-mip.fr, fpaletou@ast.obs-mip.fr, stheado@ast.obs-mip.fr
M. Aurière
Affiliation:
Laboratoire d'Astrophysique de Toulouse-Tarbes, Universit de Toulouse, CNRS, France email: petit@ast.obs-mip.fr, dintrans@ast.obs-mip.fr, auriere@ast.obs-mip.fr, donati@ast.obs-mip.fr, rim.fares@ast.obs-mip.fr, thomas.gastine@ast.obs-mip.fr, francois.lignieres@ast.obs-mip.fr, amorgent@ast.obs-mip.fr, julien.morin@ast.obs-mip.fr, fpaletou@ast.obs-mip.fr, stheado@ast.obs-mip.fr
C. Catala
Affiliation:
LESIA, Observatoire de Paris-Meudon, 92195 Meudon, France email: claude.catala@obspm.fr, julio.ramirez@obspm.fr
J.-F. Donati
Affiliation:
Laboratoire d'Astrophysique de Toulouse-Tarbes, Universit de Toulouse, CNRS, France email: petit@ast.obs-mip.fr, dintrans@ast.obs-mip.fr, auriere@ast.obs-mip.fr, donati@ast.obs-mip.fr, rim.fares@ast.obs-mip.fr, thomas.gastine@ast.obs-mip.fr, francois.lignieres@ast.obs-mip.fr, amorgent@ast.obs-mip.fr, julien.morin@ast.obs-mip.fr, fpaletou@ast.obs-mip.fr, stheado@ast.obs-mip.fr
R. Fares
Affiliation:
Laboratoire d'Astrophysique de Toulouse-Tarbes, Universit de Toulouse, CNRS, France email: petit@ast.obs-mip.fr, dintrans@ast.obs-mip.fr, auriere@ast.obs-mip.fr, donati@ast.obs-mip.fr, rim.fares@ast.obs-mip.fr, thomas.gastine@ast.obs-mip.fr, francois.lignieres@ast.obs-mip.fr, amorgent@ast.obs-mip.fr, julien.morin@ast.obs-mip.fr, fpaletou@ast.obs-mip.fr, stheado@ast.obs-mip.fr
T. Gastine
Affiliation:
Laboratoire d'Astrophysique de Toulouse-Tarbes, Universit de Toulouse, CNRS, France email: petit@ast.obs-mip.fr, dintrans@ast.obs-mip.fr, auriere@ast.obs-mip.fr, donati@ast.obs-mip.fr, rim.fares@ast.obs-mip.fr, thomas.gastine@ast.obs-mip.fr, francois.lignieres@ast.obs-mip.fr, amorgent@ast.obs-mip.fr, julien.morin@ast.obs-mip.fr, fpaletou@ast.obs-mip.fr, stheado@ast.obs-mip.fr
F. Lignières
Affiliation:
Laboratoire d'Astrophysique de Toulouse-Tarbes, Universit de Toulouse, CNRS, France email: petit@ast.obs-mip.fr, dintrans@ast.obs-mip.fr, auriere@ast.obs-mip.fr, donati@ast.obs-mip.fr, rim.fares@ast.obs-mip.fr, thomas.gastine@ast.obs-mip.fr, francois.lignieres@ast.obs-mip.fr, amorgent@ast.obs-mip.fr, julien.morin@ast.obs-mip.fr, fpaletou@ast.obs-mip.fr, stheado@ast.obs-mip.fr
A. Morgenthaler
Affiliation:
Laboratoire d'Astrophysique de Toulouse-Tarbes, Universit de Toulouse, CNRS, France email: petit@ast.obs-mip.fr, dintrans@ast.obs-mip.fr, auriere@ast.obs-mip.fr, donati@ast.obs-mip.fr, rim.fares@ast.obs-mip.fr, thomas.gastine@ast.obs-mip.fr, francois.lignieres@ast.obs-mip.fr, amorgent@ast.obs-mip.fr, julien.morin@ast.obs-mip.fr, fpaletou@ast.obs-mip.fr, stheado@ast.obs-mip.fr
J. Morin
Affiliation:
Laboratoire d'Astrophysique de Toulouse-Tarbes, Universit de Toulouse, CNRS, France email: petit@ast.obs-mip.fr, dintrans@ast.obs-mip.fr, auriere@ast.obs-mip.fr, donati@ast.obs-mip.fr, rim.fares@ast.obs-mip.fr, thomas.gastine@ast.obs-mip.fr, francois.lignieres@ast.obs-mip.fr, amorgent@ast.obs-mip.fr, julien.morin@ast.obs-mip.fr, fpaletou@ast.obs-mip.fr, stheado@ast.obs-mip.fr
F. Paletou
Affiliation:
Laboratoire d'Astrophysique de Toulouse-Tarbes, Universit de Toulouse, CNRS, France email: petit@ast.obs-mip.fr, dintrans@ast.obs-mip.fr, auriere@ast.obs-mip.fr, donati@ast.obs-mip.fr, rim.fares@ast.obs-mip.fr, thomas.gastine@ast.obs-mip.fr, francois.lignieres@ast.obs-mip.fr, amorgent@ast.obs-mip.fr, julien.morin@ast.obs-mip.fr, fpaletou@ast.obs-mip.fr, stheado@ast.obs-mip.fr
J. Ramirez
Affiliation:
LESIA, Observatoire de Paris-Meudon, 92195 Meudon, France email: claude.catala@obspm.fr, julio.ramirez@obspm.fr
S. K. Solanki
Affiliation:
Max-Planck-Institut fr Sonnensystemforschung, Max-Planck-Str. 2, 37191 Katlenburg-Lindau, Germany, email: solanki@mps.mpg.de
S. Théado
Affiliation:
Laboratoire d'Astrophysique de Toulouse-Tarbes, Universit de Toulouse, CNRS, France email: petit@ast.obs-mip.fr, dintrans@ast.obs-mip.fr, auriere@ast.obs-mip.fr, donati@ast.obs-mip.fr, rim.fares@ast.obs-mip.fr, thomas.gastine@ast.obs-mip.fr, francois.lignieres@ast.obs-mip.fr, amorgent@ast.obs-mip.fr, julien.morin@ast.obs-mip.fr, fpaletou@ast.obs-mip.fr, stheado@ast.obs-mip.fr
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Abstract

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Sun-like stars are able to continuously generate a large-scale magnetic field through the action of a dynamo. Various physical parameters of the star are able to affect the dynamo output, in particular the rotation and mass. Using the NARVAL spectropolarimeter (Observatoire du Pic du Midi, France), it is now possible to measure the large-scale magnetic field of solar analogues (i.e. stars very close to the Sun in the mass-rotation plane, including strict solar twins). From spectropolarimetric time-series, tomographic inversion enables one to reconstruct the field geometry and its progressive distortion under the effect of surface differential rotation. We show the first results obtained on a sample of main-sequence dwarfs, probing masses between 0.7 and 1.4 solar mass and rotation rates between 1 and 3 solar rotation rate.

Keywords

Stars: activity – stars: atmospheres – stars: imaging – stars: late-type – stars: magnetic fields – stars: rotation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Symposium S259: Cosmic Magnetic Fields: From Planets, to Stars and Galaxies , November 2008 , pp. 441 - 442
Copyright
Copyright © International Astronomical Union 2009

References

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