%0 Journal Article
%T WASP-78b and WASP-79b: Two highly-bloated hot Jupiter-mass exoplanets orbiting F-type stars in Eridanus
%A B. Smalley
%A D. R. Anderson
%A A. Collier-Cameron
%A A. P. Doyle
%A A. Fumel
%A M. Gillon
%A C. Hellier
%A E. Jehin
%A M. Lendl
%A P. F. L. Maxted
%A F. Pepe
%A D. Pollacco
%A D. Queloz
%A D. Segransan
%A A. M. S. Smith
%A J. Southworth
%A A. H. M. J. Triaud
%A S. Udry
%A R. G. West
%J Physics
%D 2012
%I arXiv
%R 10.1051/0004-6361/201219731
%X We report the discovery of WASP-78b and WASP-79b, two highly-bloated Jupiter-mass exoplanets orbiting F-type host stars. WASP-78b orbits its V=12.0 host star (TYC 5889-271-1) every 2.175 days and WASP-79b orbits its V=10.1 host star (CD-30 1812) every 3.662 days. Planetary parameters have been determined using a simultaneous fit to WASP and TRAPPIST transit photometry and CORALIE radial-velocity measurements. For WASP-78b a planetary mass of 0.89 +/- 0.08 M_Jup and a radius of 1.70 +/- 0.11 R_Jup is found. The planetary equilibrium temperature of T_P = 2350 +/- 80 K for WASP-78b makes it one of the hottest of the currently known exoplanets. WASP-79b its found to have a planetary mass of 0.90 +/- 0.08 M_Jup, but with a somewhat uncertain radius due to lack of sufficient TRAPPIST photometry. The planetary radius is at least 1.70 +/- 0.11 R_Jup, but could be as large as 2.09 +/- 0.14 R_Jup, which would make WASP-79b the largest known exoplanet.
%U http://arxiv.org/abs/1206.1177v2