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arxiv: 1009.2597 · v1 · submitted 2010-09-14 · 🌌 astro-ph.EP

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Transiting exoplanets from the CoRoT space mission XIV. CoRoT-11b: a transiting massive "hot-Jupiter" in a prograde orbit around a rapidly rotating F-type star

D. Gandolfi , G. H\'ebrard , R. Alonso , M. Deleuil , E. W. Guenther , M. Fridlund , M. Endl , P. Eigm\"uller
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Sz. Csizmadia M. Havel S. Aigrain M. Auvergne A. Baglin P. Barge A. S. Bonomo P. Bord\'e F. Bouchy H. Bruntt J. Cabrera S. Carpano L. Carone W. D. Cochran H. J. Deeg R. Dvorak J. Eisl\"offel A. Erikson S. Ferraz-Mello J.-C. Gazzano N. P. Gibson M. Gillon P. Gondoin T. Guillot M. Hartmann A. Hatzes L. Jorda P. Kabath A. L\'eger A. Llebaria H. Lammer P. J. MacQueen M. Mayor T. Mazeh C. Moutou M. Ollivier M. P\"atzold F. Pepe D. Queloz H. Rauer D. Rouan B. Samuel J. Schneider B. Stecklum B. Tingley S. Udry G. Wuchterl
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classification 🌌 astro-ph.EP
keywords transitingcorotcorot-11bstarcausedhighhot-jupitermassive
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The CoRoT exoplanet science team announces the discovery of CoRoT-11b, a fairly massive hot-Jupiter transiting a V=12.9 mag F6 dwarf star (M*=1.27 +/- 0.05 Msun, R*=1.37 +/- 0.03 Rsun, Teff=6440 +/- 120 K), with an orbital period of P=2.994329 +/- 0.000011 days and semi-major axis a=0.0436 +/- 0.005 AU. The detection of part of the radial velocity anomaly caused by the Rossiter-McLaughlin effect shows that the transit-like events detected by CoRoT are caused by a planet-sized transiting object in a prograde orbit. The relatively high projected rotational velocity of the star (vsini=40+/-5 km/s) places CoRoT-11 among the most rapidly rotating planet host stars discovered so far. With a planetary mass of mp=2.33+/-0.34 Mjup and radius rp=1.43+/-0.03 Rjup, the resulting mean density of CoRoT-11b (rho=0.99+/-0.15 g/cm^3) can be explained with a model for an inflated hydrogen-planet with a solar composition and a high level of energy dissipation in its interior.

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