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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: [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected]
B. Dintrans
Affiliation:
Laboratoire d'Astrophysique de Toulouse-Tarbes, Universit de Toulouse, CNRS, France email: [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected]
M. Aurière
Affiliation:
Laboratoire d'Astrophysique de Toulouse-Tarbes, Universit de Toulouse, CNRS, France email: [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected]
C. Catala
Affiliation:
LESIA, Observatoire de Paris-Meudon, 92195 Meudon, France email: [email protected], [email protected]
J.-F. Donati
Affiliation:
Laboratoire d'Astrophysique de Toulouse-Tarbes, Universit de Toulouse, CNRS, France email: [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected]
R. Fares
Affiliation:
Laboratoire d'Astrophysique de Toulouse-Tarbes, Universit de Toulouse, CNRS, France email: [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected]
T. Gastine
Affiliation:
Laboratoire d'Astrophysique de Toulouse-Tarbes, Universit de Toulouse, CNRS, France email: [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected]
F. Lignières
Affiliation:
Laboratoire d'Astrophysique de Toulouse-Tarbes, Universit de Toulouse, CNRS, France email: [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected]
A. Morgenthaler
Affiliation:
Laboratoire d'Astrophysique de Toulouse-Tarbes, Universit de Toulouse, CNRS, France email: [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected]
J. Morin
Affiliation:
Laboratoire d'Astrophysique de Toulouse-Tarbes, Universit de Toulouse, CNRS, France email: [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected]
F. Paletou
Affiliation:
Laboratoire d'Astrophysique de Toulouse-Tarbes, Universit de Toulouse, CNRS, France email: [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected]
J. Ramirez
Affiliation:
LESIA, Observatoire de Paris-Meudon, 92195 Meudon, France email: [email protected], [email protected]
S. K. Solanki
Affiliation:
Max-Planck-Institut fr Sonnensystemforschung, Max-Planck-Str. 2, 37191 Katlenburg-Lindau, Germany, email: [email protected]
S. Théado
Affiliation:
Laboratoire d'Astrophysique de Toulouse-Tarbes, Universit de Toulouse, CNRS, France email: [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected]
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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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