We present VLT eclipse photometry for the giant planet CoRoT-1b. We observed a transit in the R-band filter and an occultation in a narrow filter centered on 2.09 microns. Our analysis of this new photometry and published radial velocities, in combination with stellar-evolutionary modeling, leads to a planetary mass and radius of 1.07 (+0.13,-0.18) M_Jup and 1.45 (+0.07,-0.13) R_Jup, confirming the very low density previously deduced from CoRoT photometry. The large occultation depth that we measure at 2.09 microns (0.278 (+0.043,-0.066) %) is consistent with thermal emission and is better reproduced by an atmospheric model with no redistribution of the absorbed stellar flux to the night side of the planet.
@article{arxiv.0905.4571,
title = {VLT transit and occultation photometry for the bloated planet CoRoT-1b},
author = {M. Gillon and B. -O. Demory and A. H. M. J. Triaud and T. Barman and L. Hebb and J. Montalban and P. F. L. Maxted and D. Queloz and M. Deleuil and P. Magain},
journal= {arXiv preprint arXiv:0905.4571},
year = {2015}
}
Comments
Accepted for publication in Astronomy and Astrophysics