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

Abstract
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 R_p = 1.461 ± 0.077R_J and M_p = 0.805 ± 0.068M_J. WASP-93b orbits its F4 host star every 2.73 d and has R_p = 1.597 ± 0.077R_J and M_p = 1.47 ± 0.029M_J. WASP-118b also has a hot host star (F6) and is moderately inflated, where R_p = 1.440 ± 0.036R_J and M_p = 0.514 ± 0.020M_J 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.

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

Monthly Notices of the Royal Astronomical Society
Volume 463, Page 3276
August 2016

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