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27 April 2024

» arxiv » 1206.1177

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WASP-78b and WASP-79b: Two highly-bloated hot Jupiter-mass exoplanets orbiting F-type stars in Eridanus
B. Smalley ; D.R. Anderson ; A. Collier-Cameron ; A.P. Doyle ; M. Gillon ; C. Hellier ; E. Jehin ; M. Lendl ; P.F.L. Maxted ; F. Pepe ; D. Pollacco ; D. Queloz ; D. Segransan ; A.M.S. Smith ; J. Southworth ; A.H.M.J. Triaud ; S. Udry ; R.G. West ;
Date:	6 Jun 2012
Abstract:	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. A simultaneous fit to WASP and TRAPPIST transit photometry and CORALIE radial-velocity measurements yields planetary masses of 0.89 +/- 0.08 M_Jup and 0.90 +/- 0.08 M_Jup, and radii of 1.70 +/- 0.11 R_Jup and 2.09 +/- 0.14 R_Jup, for WASP-78b and WASP-79b, respectively. The planetary equilibrium temperature of T_P = 2350 +/- 80 K for WASP-78b makes it one of the hottest of the currently known exoplanets. The radius of WASP-79b suggests that it is potentially the largest known exoplanet.
Source:	arXiv, 1206.1177
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