SOPHIE velocimetry of Kepler transit candidates II. (A. Santerne et al.)

Vol. 528In section 10. Planets and planetary systems

SOPHIE velocimetry of Kepler transit candidates II. KOI-428b: a hot Jupiter transiting a subgiant F-star

by A. Santerne, R. F. Diaz, F. Bouchy, M. Deleuil, C. Moutou, G. Hébrard, A. Eggenberger, D. Ehrenreich, C. Gry, and S. Udry, A&A 528, A63 alt

In June 2010, the Kepler team released their first set of photometric data following the monitoring of 156,000 stars. The global analysis yielded 706 exoplanet candidates detected by the transit method. Of these, 306 candidates detected around faint stars (14<=mV<=16) were publicly released. The publication by Santerne et al. is the first confirmation that one of these 306 candidates used radial velocimetry and the SOPHIE spectrograph. The planet, KOI-428b is a 1.17 Jupiter-radius, 2.2 Jupiter-mass planet orbiting at 6.87 days from its star. Interestingly, the star, which is type F5IV with a radius equal to 2.13 that of the Sun and is 1.48 times its mass, is the largest and most evolved star discovered so far with a transiting planet.