Three irradiated and bloated hot Jupiters: WASP-76b, WASP-82b, and WASP-90b

R. G. West , C. Hellier , J. -M. Almenara (1) , D. R. Anderson , S. C. C. Barros (2) , F. Bouchy (3, 4) , D. J. A. Brown , A. Collier Cameron (5) , M. Deleuil (6) , L. Delrez , A. P. Doyle , F. Faedi , A. Fumel (7) , M. Gillon (8) , Y. Gomez Maqueo Chew , G. Hébrard (4) , E. Jehin (8) , M. Lendl , P. F. L. Maxted , F. Pepe (9) , D. Pollacco , D. Queloz (9) , D. Segransan (9) , B. Smalley , A. M. S. Smith , J. Southworth , A. H. M. J. Triaud (9) , S. Udry (9)

1 IAC - Instituto de Astrofisica de Canarias
2 Virologia
3 OHP - Observatoire de Haute-Provence
4 IAP - Institut d'Astrophysique de Paris
5 University of St Andrews [Scotland]
6 LAM - Laboratoire d'Astrophysique de Marseille
7 LATT - Laboratoire Astrophysique de Toulouse-Tarbes
8 Institut d'Astrophysique et de Géophysique [Liège]
9 ObsGE - Observatoire Astronomique de l'Université de Genève

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-circle dot). 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 similar to 2 R-circle dot 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.

Domaines: Astrophysique [astro-ph]

R. G. West, C. Hellier, J. -M. Almenara, D. R. Anderson, S. C. C. Barros, et al.. Three irradiated and bloated hot Jupiters: WASP-76b, WASP-82b, and WASP-90b. Astronomy and Astrophysics - A&A, 2016, 585, ⟨10.1051/0004-6361/201527276⟩. ⟨hal-01440108⟩