The secondary eclipse of CoRoT-1b
Abstract
The transiting planet CoRoT-1b is thought to belong to the pM-class of planets, in which the thermal emission dominates in the optical wavelengths. We present a detection of its secondary eclipse in the CoRoT white channel data, whose response function goes from ~400 to ~1000 nm. We used two different filtering approaches, and several methods to evaluate the significance of a detection of the secondary eclipse. We detect a secondary eclipse centered within 20 min at the expected times for a circular orbit, with a depth of 0.016+/-0.006%. The center of the eclipse is translated in a 1-sigma upper limit to the planet's eccentricity of ecosomega<0.014. Under the assumption of a zero Bond Albedo and blackbody emission from the planet, it corresponds to a T_{CoRoT}=2330 +120-140 K. We provide the equilibrium temperatures of the planet as a function of the amount of reflected light. If the planet is in thermal equilibrium with the incident flux from the star, our results imply an inefficient transport mechanism of the flux from the day to the night sides.
Keywords
Cite
@article{arxiv.0907.1653,
title = {The secondary eclipse of CoRoT-1b},
author = {R. Alonso and A. Alapini and S. Aigrain and M. Auvergne and A. Baglin and M. Barbieri and P. Barge and A. S. Bonomo and P. Borde and F. Bouchy and S. Chaintreuil and R. De la Reza and H. J. Deeg and M. Deleuil and R. Dvorak and A. Erikson and M. Fridlund and F. Fialho and P. Gondoin and T. Guillot and A. Hatzes and L. Jorda and H. Lammer and A. Leger and A. Llebaria and P. Magain and T. Mazeh and C. Moutou and M. Ollivier and M. Patzold and F. Pont and D. Queloz and H. Rauer and D. Rouan and J. Schneider and G. Wuchterl},
journal= {arXiv preprint arXiv:0907.1653},
year = {2010}
}
Comments
6 pages, to appear in A&A, submitted 18 march 2009, accepted 7 July 2009