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WASP-92b, WASP-93b and WASP-118b: three new transiting close-in giant planets

K. L. Hay, A. Collier Cameron, A. P. Doyle, G. Hébrard, I. Skillen, D. R. Anderson, S. C. C. Barros, D. J. A. Brown, F. Bouchy, R. Busuttil, P. Delorme, L. Delrez, O. Demangeon, R. F. Díaz, M. Gillon, Y. Gómez Maqueo Chew, E. Gonzàlez, C. Hellier, S. Holmes, J. F. Jarvis, E. Jehin, Y. C. Joshi, U. C. Kolb, M. Lendl, P. F. L. Maxted, J. McCormac, G. R. M. Miller, A. Mortier, E. Pallé, D. Pollacco, J. Prieto-Arranz, D. Queloz, D. Ségransan, E. Simpson, B. Smalley, J. Southworth, A. H. M. J. Triaud, O. Turner, S. Udry, M. Vanhuysse, R. G. West, P. A. Wilson

We present the discovery of three new transiting giant planets, first detected with the WASP telescopes, and establish their planetary nature with follow up spectroscopy and ground-based photometric light curves. WASP-92 is an F7 star, with a moderately inflated planet orbiting with a period of 2.17 d, which has Rp = 1.461 ± 0.077RJ and Mp = 0.805 ± 0.068MJ. WASP-93b orbits its F4 host star every 2.73 d and has Rp = 1.597 ± 0.077RJ and Mp = 1.47 ± 0.029MJ. WASP-118b also has a hot host star (F6) and is moderately inflated, where Rp = 1.440 ± 0.036RJ and Mp = 0.514 ± 0.020MJ and the planet has an orbital period of 4.05 d. They are bright targets (V = 13.18, 10.97 and 11.07, respectively) ideal for further characterization work, particularly WASP-118b, which is being observed by K2 as part of campaign 8. The WASP-93 system has sufficient angular momentum to be tidally migrating outwards if the system is near spin-orbit alignment, which is divergent from the tidal behaviour of the majority of hot Jupiters discovered.

techniques: photometric, techniques: radial velocities, planets and satellites: detection, planet-star interactions, planetary systems

Monthly Notices of the Royal Astronomical Society
Volume 463, Issue 3, Page 3276
2016 December

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Faculdade de Ciências da Universidade de Lisboa Universidade do Porto Faculdade de Ciências e Tecnologia da Universidade de Coimbra
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia