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

R. G. West, C. Hellier, J.-M. Almenara, D. R. Anderson, S. C. C. Barros, F. Bouchy, D. J. A. Brown, A. Collier Cameron, M. Deleuil, L. Delrez, A. P. Doyle, F. Faedi, A. Fumel, M. Gillon, Y. Gómez Maqueo Chew, G. Hébrard, E. Jehin, M. Lendl, P. F. L. Maxted, F. PepeD. Pollacco, D. Queloz, D. Ségransan, B. Smalley, A. M. S. Smith, J. Southworth, A. H. M. J. Triaud, S. Udry

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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 RJup. 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.
Original languageEnglish
Article numberA126
Number of pages7
JournalAstronomy & Astrophysics
Volume585
DOIs
Publication statusPublished - 8 Jan 2016

Keywords

  • Planetary systems
  • Stars: individual: WASP-76
  • Stars: individual: WASP-82
  • Stars: individual: WASP-90

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