Transiting exoplanets from the CoRoT space mission. XV. CoRoT-15b: a brown dwarf transiting companion
F. Bouchy, M. Deleuil, T. Guillot, S. Aigrain, L. Carone, W.D., Cochran, et al.

TL;DR
This paper reports the discovery of CoRoT-15b, a transiting brown dwarf with a 3.06-day orbit around an F7V star, highlighting its unique properties and implications for brown dwarf evolution.
Contribution
It presents the first detailed characterization of CoRoT-15b, a brown dwarf transiting companion, including its mass, radius, and potential evolutionary state, expanding knowledge of substellar objects.
Findings
CoRoT-15b has a mass of 63.3 Mjup and radius of 1.12 Rjup.
The system's spin period is between 2.9 and 3.1 days.
CoRoT-15b is either very young or inflated compared to models.
Abstract
We report the discovery by the CoRoT space mission of a transiting brown dwarf orbiting a F7V star with an orbital period of 3.06 days. CoRoT-15b has a radius of 1.12 +0.30 -0.15 Rjup, a mass of 63.3 +- 4.1 Mjup, and is thus the second transiting companion lying in the theoretical mass domain of brown dwarfs. CoRoT-15b is either very young or inflated compared to standard evolution models, a situation similar to that of M-dwarfs stars orbiting close to solar-type stars. Spectroscopic constraints and an analysis of the lightcurve favors a spin period between 2.9 and 3.1 days for the central star, compatible with a double-synchronisation of the system.
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Taxonomy
TopicsStellar, planetary, and galactic studies · Astro and Planetary Science · Astronomy and Astrophysical Research
