Transiting exoplanets from the CoRoT space mission XVII. The hot Jupiter CoRoT-17b: a very old planet

Sz. Csizmadia , C. Moutou , M. Deleuil , J. Cabrera , M. Fridlund , D. Gandolfi , S. Aigrain , R. Alonso , J. M. Almenara , M. Auvergne , A. Baglin , P. Barge , A. S. Bonomo , Pascal Bordé , F. Bouchy , H. Bruntt , L. Carone , S. Carpano , C. Cavarroc , W. Cochran , H. J. Deeg , R. F. Diaz , R. Dvorak , M. Endl , A. Erikson , S. Ferraz-Mello , Th. Fruth , J. C. Gazzano , M. Gillon (1) , E. W. Guenther , T. Guillot (2) , A. Hatzes , M. Havel (2) , G. Hebrard , E. Jehin (1) , L. Jorda (3) , A. Leger , A. Llebaria , H. Lammer , C. Lovis , P. J. Macqueen , T. Mazeh , M. Ollivier (4) , M. Paetzold , D. Queloz , H. Rauer , D. Rouan , A. Santerne , Jodi Schneider , B. Tingley , R. Titz-Weider , G. Wuchterl

1 Institut d'Astrophysique et de Géophysique [Liège]
2 CASSIOPEE - Laboratoire de Cosmologie, Astrophysique Stellaire & Solaire, de Planétologie et de Mécanique des Fluides
3 LAM - Laboratoire d'Astrophysique de Marseille
4 LTM - Laboratoire des technologies de la microélectronique

We report on the discovery of a hot Jupiter-type exoplanet, CoRoT-17b, detected by the CoRoT satellite. It has a mass of $2.43\pm0.30$\Mjup and a radius of $1.02\pm0.07$\Rjup, while its mean density is $2.82\pm0.38$ g/cm$^3$. CoRoT-17b is in a circular orbit with a period of $3.7681\pm0.0003$ days. The host star is an old ($10.7\pm1.0$ Gyr) main-sequence star, which makes it an intriguing object for planetary evolution studies. The planet's internal composition is not well constrained and can range from pure H/He to one that can contain $\sim$380 earth masses of heavier elements.

Domaines: Planétologie et astrophysique de la terre [astro-ph.EP]; Planétologie et astrophysique de la terre [astro-ph.EP]

Sz. Csizmadia, C. Moutou, M. Deleuil, J. Cabrera, M. Fridlund, et al.. Transiting exoplanets from the CoRoT space mission XVII. The hot Jupiter CoRoT-17b: a very old planet. 2011. ⟨hal-00660757⟩