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

Pascal Petit; B. Dintrans; M. Aurière; C. Catala; J. F. Donati; R. Fares; T. Gastine; F. Lignières; A. Morgenthaler; J. Morin; F. Paletou; J. Ramirez; S. K. Solanki; S. Théado

doi:10.1017/S1743921309031068

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

Pascal Petit, B. Dintrans, M. Aurière, C. Catala, J. F. Donati, R. Fares, T. Gastine, F. Lignières, A. Morgenthaler, J. Morin, F. Paletou, J. Ramirez, S. K. Solanki, S. Théado

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Pages (from-to)	441-442
Number of pages	2
Journal	Proceedings of the International Astronomical Union
Volume	4
DOIs	https://doi.org/10.1017/S1743921309031068
Publication status	Published - Nov 1 2008
Externally published	Yes

Keywords

Stars: activity
stars: atmospheres
stars: imaging
stars: late-type
stars: magnetic fields
stars: rotation

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1017/S1743921309031068

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Petit, P., Dintrans, B., Aurière, M., Catala, C., Donati, J. F., Fares, R., Gastine, T., Lignières, F., Morgenthaler, A., Morin, J., Paletou, F., Ramirez, J., Solanki, S. K., & Théado, S. (2008). Magnetic geometries of Sun-like stars: Exploring the mass-rotation plane. Proceedings of the International Astronomical Union, 4, 441-442. https://doi.org/10.1017/S1743921309031068

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title = "Magnetic geometries of Sun-like stars: Exploring the mass-rotation plane",

abstract = "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",

author = "Pascal Petit and B. Dintrans and M. Auri{\`e}re and C. Catala and Donati, {J. F.} and R. Fares and T. Gastine and F. Ligni{\`e}res and A. Morgenthaler and J. Morin and F. Paletou and J. Ramirez and Solanki, {S. K.} and S. Th{\'e}ado",

note = "Publisher Copyright: Copyright {\textcopyright} International Astronomical Union 2009.",

year = "2008",

month = nov,

day = "1",

doi = "10.1017/S1743921309031068",

language = "English",

volume = "4",

pages = "441--442",

journal = "Proceedings of the International Astronomical Union",

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TY - JOUR

T1 - Magnetic geometries of Sun-like stars

T2 - Exploring the mass-rotation plane

AU - Petit, Pascal

AU - Dintrans, B.

AU - Aurière, M.

AU - Catala, C.

AU - Donati, J. F.

AU - Fares, R.

AU - Gastine, T.

AU - Lignières, F.

AU - Morgenthaler, A.

AU - Morin, J.

AU - Paletou, F.

AU - Ramirez, J.

AU - Solanki, S. K.

AU - Théado, S.

PY - 2008/11/1

Y1 - 2008/11/1

N2 - 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.

AB - 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.

KW - Stars: activity

KW - stars: atmospheres

KW - stars: imaging

KW - stars: late-type

KW - stars: magnetic fields

KW - stars: rotation

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JO - Proceedings of the International Astronomical Union

JF - Proceedings of the International Astronomical Union

ER -

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

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Keywords

ASJC Scopus subject areas

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