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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 693635.0, MPI für Astronomie / Publikationen_mpia
Atmospheric mass-loss and evolution of short-period exoplanets: the examples of CoRoT-7b and Kepler-10b
Authors:Kurokawa, H.; Kaltenegger, L.
Date of Publication (YYYY-MM-DD):2013
Title of Journal:Monthly Notices of the Royal Astronomical Society
Issue / Number:4
Start Page:3239
End Page:3245
Audience:Not Specified
Abstract / Description:Short-period exoplanets potentially lose envelope masses during their evolution because of atmospheric escape caused by the intense X-ray and extreme UV (XUV) radiation from their host stars. We develop a combined model of atmospheric mass-loss calculation and thermal evolution calculation of a planet to simulate its evolution and explore the dependences on the formation history of the planet. Thermal atmospheric escape as well as the Roche lobe overflow contributes to mass-loss. The maximum initial planetary model mass depends primarily on the assumed evolution model of the stellar XUV luminosity. We adapt the model to CoRoT-7b and Kepler-10b to explore the evolution of both planets and the maximum initial mass of these planets. We take the recent X-ray observation of CoRoT-7 into account and explore the effect of different XUV evolution models on the planetary initial mass. Our calculations indicate that both hot super-Earths could be remnants of Jupiter-mass gas planets.
Free Keywords:planets and satellites: atmospheres; planets and satellites: composition; planets and satellites: individual: CoRoT-7b; planets and satellites: individual: Kepler-10b; planets and satellites: physical evolution; stars: activity
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
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