Temperature inversion and the evolution of exoplanets

Details Temperature inversion and the evolution of exoplanets Temperature inversion and the evolution of exoplanets

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf.1367p&link_type=abstract

EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.1367

Physics

Scientific paper

Most of the known exoplanets are Jupiter-size planets orbiting very close to their star. These planets are subjected to a high irradiation from their star. Atmospheres are the link between deep interior and outside of these planets. They control both the amount of energy that can be deposited by the star into the deep interior and the amount of internal heat allowed to escape from the planet.Their characteristic can influence the evolution of the planet. It has been proposed that two class of exoplanets might exist : with and without temperature inversion in their atmosphere [1]. Here, we implement a three-band analytical model for the atmosphere of giant planets which is coherent with the model interior. It allows us to solve both parts together and to study in detail the effects of atmospheric parameters on the global evolution of the planet. We first estimate that the plan-parallel approximation can lead to systematic errors in the model radius of up to 1%. We then study the influence of the presence of a temperature inversion on the planetary evolution. We find that planets with a temperature inversion should be smaller than planets without a temperature inversion by 2 to 10% depending on the irradiation flux they receive.

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