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-15bhas a radius of 1.12+0.30-0.15 {R}Jup and a mass of 63.3 ± 4.1 {M}Jup, 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-dwarf stars orbiting close to solar-type stars. Spectroscopic constraints and an analysis of the light curve imply a spin period in the range 2.9-3.1 days for the central star, which is compatible with a double-synchronisation of the system.
Original language | English |
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Article number | A68 |
Number of pages | 6 |
Journal | Astronomy and Astrophysics |
Volume | 525 |
Early online date | 02 Dec 2010 |
DOIs | |
Publication status | Published - Jan 2011 |
Externally published | Yes |
Keywords
- brown dwarfs
- stars: low-mass
- planetary systems
- techniques: photometric
- techniques: radial velocities
- techniques: spectroscopic