a1 Steward Observatory and Dept. of Astronomy, University of Arizona, 933 N. Cherry Ave., Tucson, AZ 85721, USA email: firstname.lastname@example.org
a2 Dept. of Astrophysical Sciences, Princeton University, Peyton Hall, Princeton, NJ 0854, USA email: email@example.com
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 be caused by an upper-atmosphere absorber whose exact nature is still uncertain.