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Article Dans Une Revue Icarus Année : 2011

The extreme physical properties of the CoRoT-7b super-Earth

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  • Fonction : Auteur
O. Demangeon

Résumé

► Here, we discuss the extreme physical properties possible for the first characterized rocky super-Earth, CoRoT-7b ( = 1.58 , = 5.7 ). ► We make the working hypothesis that the planet is rocky with no volatiles in its atmosphere, and derive the physical properties that result. ► The dayside is very hot (2500 K at the sub-stellar point) while the nightside is very cold (∼ 50 K). The sub-stellar point is as hot as the tungsten filament of an incandescent bulb, resulting in the melting and distillation of silicate rocks and the formation of a lava ocean. ► These possible features of CoRoT-7b should be common to many small and hot planets, including Kepler-10b. They define a new class of objects that we propose to name ''Lava-ocean planets''.
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Dates et versions

hal-00743840 , version 1 (21-10-2012)

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A. Léger, O. Grasset, B. Fegley, F. Codron, A.F. Albarede, et al.. The extreme physical properties of the CoRoT-7b super-Earth. Icarus, 2011, 213 (1), pp.1-11. ⟨10.1016/j.icarus.2011.02.004⟩. ⟨hal-00743840⟩
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