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Could star-planet magnetic interactions lead to planet migration and influence stellar rotation?

Published online by Cambridge University Press:  24 September 2020

Jérémy Ahuir Open the ORCID record for Jérémy Ahuir [Opens in a new window] ,
Antoine Strugarek ,
Allan Sacha Brun ,
Stéphane Mathis ,
Emeline Bolmont ,
Mansour Benbakoura ,
Victor Réville  and
Christophe Le Poncin-Lafitte
Jérémy Ahuir
Affiliation:
Département d’Astrophysique-AIM, CEA/IRFU, CNRS/INSU, Université Paris-Saclay, Université Paris Diderot, Université de Paris, 91191 Gif-sur-Yvette, France email: jeremy.ahuir@cea.fr
Antoine Strugarek
Affiliation:
Département d’Astrophysique-AIM, CEA/IRFU, CNRS/INSU, Université Paris-Saclay, Université Paris Diderot, Université de Paris, 91191 Gif-sur-Yvette, France email: jeremy.ahuir@cea.fr
Allan Sacha Brun
Affiliation:
Département d’Astrophysique-AIM, CEA/IRFU, CNRS/INSU, Université Paris-Saclay, Université Paris Diderot, Université de Paris, 91191 Gif-sur-Yvette, France email: jeremy.ahuir@cea.fr
Stéphane Mathis
Affiliation:
Département d’Astrophysique-AIM, CEA/IRFU, CNRS/INSU, Université Paris-Saclay, Université Paris Diderot, Université de Paris, 91191 Gif-sur-Yvette, France email: jeremy.ahuir@cea.fr
Emeline Bolmont
Affiliation:
Département d’Astrophysique-AIM, CEA/IRFU, CNRS/INSU, Université Paris-Saclay, Université Paris Diderot, Université de Paris, 91191 Gif-sur-Yvette, France email: jeremy.ahuir@cea.fr Observatoire Astronomique de l’Université de Genève, Université de Genève, CH-1290 Versoix, Switzerland
Mansour Benbakoura
Affiliation:
Département d’Astrophysique-AIM, CEA/IRFU, CNRS/INSU, Université Paris-Saclay, Université Paris Diderot, Université de Paris, 91191 Gif-sur-Yvette, France email: jeremy.ahuir@cea.fr
Victor Réville
Affiliation:
Département d’Astrophysique-AIM, CEA/IRFU, CNRS/INSU, Université Paris-Saclay, Université Paris Diderot, Université de Paris, 91191 Gif-sur-Yvette, France email: jeremy.ahuir@cea.fr IRAP, Université Toulouse III - Paul Sabatier, CNRS, CNES, Toulouse, France
Christophe Le Poncin-Lafitte
Affiliation:
SYRTE, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, LNE, 61 avenue de l’Observatoire, 75014 Paris, France
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Abstract

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The distribution of hot Jupiters, for which star-planet interactions can be significant, questions the evolution of exosystems. We aim to follow the orbital evolution of a planet along the rotational and structural evolution of the host star by taking into account the coupled effects of tidal and magnetic torques from ab initio prescriptions. It allows us to better understand the evolution of star-planet systems and to explain some properties of the distribution of observed close-in planets. To this end we use a numerical model of a coplanar circular star-planet system taking into account stellar structural changes, wind braking and star-planet interactions, called ESPEM (Benbakoura et al. (2019)). We find that depending on the initial configuration of the system, magnetic effects can dominate tidal effects during the various phases of the evolution, leading to an important migration of the planet and to significant changes on the rotational evolution of the star. Both kinds of interactions thus have to be taken into account to predict the evolution of compact star-planet systems.

Keywords

stellar evolutionsolar-type starsstellar rotationmagnetismstar-planet interactions
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. 295 - 299
Copyright
© International Astronomical Union 2020

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