Journal Article

An analysis of <i>CoRoT</i> multicolour photometry of exoplanets★

F. Borsa and E. Poretti

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 428, issue 1, pages 891-896
Published in print January 2013 | ISSN: 0035-8711
Published online October 2012 | e-ISSN: 1365-2966 | DOI:
An analysis of CoRoT multicolour photometry of exoplanets★

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We analysed the chromatic data of the planetary transits observed with CoRoT to supply homogeneous time series in each of the CoRoT colours. In a first step, we cleaned the chromatic light curves from the contamination of nearby stars and removed outliers and trends caused by anything different from the planetary transits. Then, we simultaneously fitted the chromatic transits of each planet, obtaining a common solution for the orbital parameters i, t0 and a/Rs, with a particular care in the fitting for different limb-darkening parameters. The planet-to-star radius ratios in the CoRoT colours are compatible when considering one planet at a time, but the ensemble of low-mass planets seems to show a peculiar behaviour of the radius ratios.

Keywords: Methods: data analysis; techniques: photometric; planetary systems

Journal Article.  4166 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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