[Interactions des exoplanètes avec leur environnement]
Les exoplanètes en orbite rapprochée sont soumises à des interactions intenses avec leur étoile hôte. Elles reçoivent une forte irradiation de l’étoile, déclenchent des phénomènes de marées dans leur hôte, et les étoiles et les planètes proches peuvent être connectées magnétiquement. Dans cette revue, je présente les concepts physiques qui sous-tendent ces trois types d’interaction. Je présente des lois d’échelle simples pour estimer leurs forces relatives et je souligne les aspects des interactions qui échappent encore à notre compréhension. Pour chaque interaction, je passe également en revue leurs effets détectables à la fois sur des systèmes étoile-planète spécifiques et sur la population d’exoplanètes telle que nous la connaissons aujourd’hui.
Exoplanets on close-in orbit are subject to intense interactions with their host star. They receive a strong irradiation from the star, trigger tides within their host, and stars and close-in planets can be magnetically connected. In this review, I introduce the physical concepts behind these three types of interaction. I provide simple scaling-laws for their relative strengths, and highlight the aspects of the interactions that still elude our understanding. For each interaction, I also review their detectable effects on both specific star-planet systems and on the population of exoplanets as we know it today.
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Mot clés : Interactions étoile-planète, systèmes planétaires, vent stellaire, échappements stellaire et planétaire, magnétohydrodynamique (MHD)
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@article{CRPHYS_2023__24_S2_A8_0,
author = {Antoine Strugarek},
title = {Interactions of exoplanets with their environment},
journal = {Comptes Rendus. Physique},
publisher = {Acad\'emie des sciences, Paris},
year = {2023},
doi = {10.5802/crphys.138},
language = {en},
note = {Online first},
}
Antoine Strugarek. Interactions of exoplanets with their environment. Comptes Rendus. Physique, Online first (2023), pp. 1-22. doi : 10.5802/crphys.138.
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