Spectrum and atmosphere models of irradiated transiting extrasolar giant planets

Details Spectrum and atmosphere models of irradiated transiting extrasolar giant planets Spectrum and atmosphere models of irradiated transiting extrasolar giant planets

2008-07-23

arxiv.org/abs/0807.3588v1

Astronomy and Astrophysics

Astrophysics

7 pages, 3 figures. To appear in the Proceedings of the 253rd IAU Symposium: "Transiting Planets", May 2008, Cambridge, MA

Scientific paper

10.1017/S1743921308026458

We show that a consistent fit to observed secondary eclipse data for several strongly irradiated transiting planets demands a temperature inversion (stratosphere) at altitude. Such a thermal inversion significantly influences the planet/star contrast ratios at the secondary eclipse,their wavelength dependences, and, importantly, the day-night flux contrast during a planetary orbit. The presence of the thermal inversion/stratosphere seems to roughly correlate with the stellar flux at the planet. Such temperature inversions might caused by an upper-atmosphere absorber whose exact nature is still uncertain

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