Three irradiated and bloated hot Jupiters:

WASP-76b, WASP-82b, and WASP-90b^⋆

¹ Department of PhysicsUniversity of Warwick, Coventry CV4 7AL, UK
e-mail: richard.west@warwick.ac.uk
² Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK
³ Aix-Marseille Université, CNRS, LAM (Laboratoire d’Astrophysique de Marseille) UMR 7326, 13388 Marseille, France
⁴ Institut d’Astrophysique de Paris, UMR 7095 CNRS, Université Pierre & Marie Curie, 75000 Paris, France
⁵ Observatoire de Haute-Provence, CNRS/OAMP, 04870St. Michel l’Observatoire, France
⁶ SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, Fife, KY16 9SS, UK
⁷ Institut d’Astrophysique et de Géophysique, Université de Liège, Allée du 6 Août 17, Bât. B5C, Liège 1, Belgium
⁸ Observatoire astronomique de l’Université de Genève, 51 Ch. des Maillettes, 1290 Sauverny, Switzerland
⁹ Cavendish Laboratory, J J Thomson Avenue, Cambridge, CB3 0HE, UK
¹⁰ N. Copernicus Astronomical Centre, Polish Academy of Sciences, Bartycka 18, 00-716 Warsaw, Poland
¹¹ Centre for Planetary Sciences, University of Toronto at Scarborough, 1265 Military Trail, Toronto, ON M1C 1A4, Canada
¹² Department of Astronomy & Astrophysics, University of Toronto, Toronto, ON M5S 3H4, Canada

Received: 31 August 2015
Accepted: 8 October 2015

Abstract

We report on three new transiting hot Jupiter planets, discovered from the WASP surveys, which we combine with radial velocities from OHP/SOPHIE and Euler/CORALIE and photometry from Euler and TRAPPIST. The planets WASP-76b, WASP-82b, and WASP-90b are all inflated, with radii of 1.7–1.8 R_Jup. All three orbit hot stars, of type F5–F7, with orbits of 1.8–3.9 d, and all three stars have evolved, post-main-sequence radii (1.7–2.2 R_⊙). Thus the three planets fit a known trend of hot Jupiters that receive high levels of irradiation being highly inflated. We caution, though, about the presence of a selection effect, in that non-inflated planets around ~2 R_⊙ post-MS stars can often produce transits too shallow to be detected by the ground-based surveys that have found the majority of transiting hot Jupiters.