SOPHIE velocimetry of Kepler transit candidates - III. KOI-423b: an 18 MJup transiting companion around an F7IV star
F. Bouchy, A. S. Bonomo, A. Santerne, C. Moutou, M. Deleuil, R. F. Díaz, A. Eggenberger, D. Ehrenreich, C. Gry, T. Guillot, M. Havel, G. Hébrard and S. Udry
