Journal
ASTRONOMY & ASTROPHYSICS
Volume 525, Issue -, Pages -Publisher
EDP SCIENCES S A
DOI: 10.1051/0004-6361/201015276
Keywords
brown dwarfs; stars: low-mass; planetary systems; techniques: photometric; techniques: radial velocities; techniques: spectroscopic
Categories
Funding
- Spanish Ministerio de Ciencia e Innovacion [ESP2007- 65480-C02-02]
- DLR [50OW0204, 50OW0603, 50QP07011]
- Belgian Science Policy Office
- STFC [ST/G002266]
- Science and Technology Facilities Council [ST/G002266/1] Funding Source: researchfish
- UK Space Agency [ST/G002266/2] Funding Source: researchfish
- STFC [ST/G002266/1] Funding Source: UKRI
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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(-0.15)(+0.30) 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 lightcurve 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.
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