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

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 lightcurves. WASP-92 is an F7 star, with a moderately inflated planet orbiting with a period of 2.17 days, which has $R_p=1.461\pm 0.077R_{\mathrm{J}}$ and $M_p=0.805\pm 0.068M_{\mathrm{J}}$. WASP-93b orbits its F4 host star every 2.73 days and has $R_p=1.597\pm 0.077R_{\mathrm{J}}$ and $M_p=1.47\pm 0.029M_{\mathrm{J}}$. WASP-118b also has a hot host star (F6) and is moderately inflated, where $R_p=1.440\pm 0.036R_{\mathrm{J}}$ and $M_p=0.513\pm 0.041M_{\mathrm{J}}$ and the planet has an orbital period of 4.05 days. They are bright targets (V = 13.18, 10.97 and 11.07 respectively) ideal for further characterisation work, particularly WASP-118b, which is being observed by K2 as part of campaign 8. WASP-93b is expected to be tidally migrating outwards, which is divergent from the tidal behaviour of the majority of hot Jupiters discovered.

14 pages, 10 figures; submitted to MNRAS

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