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The impact of magnetism on tidal dynamics in the convective envelope of low-mass stars

Published online by Cambridge University Press:  24 September 2020

A. Astoul Open the ORCID record for A. Astoul [Opens in a new window] ,
S. Mathis ,
C. Baruteau ,
F. Gallet ,
A. Strugarek Open the ORCID record for A. Strugarek [Opens in a new window] ,
K. C. Augustson Open the ORCID record for K. C. Augustson [Opens in a new window] ,
A. S. Brun Open the ORCID record for A. S. Brun [Opens in a new window]  and
E. Bolmont
A. Astoul
Affiliation:
AIM, CEA, CNRS, Université Paris-Saclay, Université Paris Diderot, Sorbonne Paris Cité, F-91191 Gif-sur-Yvette, France email: aurelie.astoul@cea.fr
S. Mathis
Affiliation:
AIM, CEA, CNRS, Université Paris-Saclay, Université Paris Diderot, Sorbonne Paris Cité, F-91191 Gif-sur-Yvette, France email: aurelie.astoul@cea.fr
C. Baruteau
Affiliation:
IRAP, Observatoire Midi-Pyrénées, Université de Toulouse, 14 avenue Edouard Belin, 31400 Toulouse, France
F. Gallet
Affiliation:
Univ. Grenoble Alpes, CNRS, IPAG, 38000 Grenoble, France
A. Strugarek
Affiliation:
AIM, CEA, CNRS, Université Paris-Saclay, Université Paris Diderot, Sorbonne Paris Cité, F-91191 Gif-sur-Yvette, France email: aurelie.astoul@cea.fr
K. C. Augustson
Affiliation:
AIM, CEA, CNRS, Université Paris-Saclay, Université Paris Diderot, Sorbonne Paris Cité, F-91191 Gif-sur-Yvette, France email: aurelie.astoul@cea.fr
A. S. Brun
Affiliation:
AIM, CEA, CNRS, Université Paris-Saclay, Université Paris Diderot, Sorbonne Paris Cité, F-91191 Gif-sur-Yvette, France email: aurelie.astoul@cea.fr
E. Bolmont
Affiliation:
Observatoire de Genève, Université de Genève, 51 Chemin des Maillettes, CH-1290 Sauverny, Switzerland
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Abstract

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For the shortest period exoplanets, star-planet tidal interactions are likely to have played a major role in the ultimate orbital evolution of the planets and on the spin evolution of the host stars. Although low-mass stars are magnetically active objects, the question of how the star’s magnetic field impacts the excitation, propagation and dissipation of tidal waves remains open. We have derived the magnetic contribution to the tidal interaction and estimated its amplitude throughout the structural and rotational evolution of low-mass stars (from K to F-type). We find that the star’s magnetic field has little influence on the excitation of tidal waves in nearly circular and coplanar Hot-Jupiter systems, but that it has a major impact on the way waves are dissipated.

Keywords

MHDwavesstars: evolutionstars: rotationstars: magnetic fieldsplanetary systems
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S354: Solar and Stellar Magnetic Fields: Origins and Manifestations , June 2019 , pp. 195 - 199
Copyright
© International Astronomical Union 2020

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