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


Abstract in English

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 $R_p = 1.461 pm 0.077 R_{rm J}$ and $M_p = 0.805 pm 0.068 M_{rm J}$. WASP-93b orbits its F4 host star every 2.73 days and has $R_p = 1.597 pm 0.077 R_{rm J}$ and $M_p = 1.47 pm 0.029 M_{rm J}$. WASP-118b also has a hot host star (F6) and is moderately inflated, where $R_p = 1.440 pm 0.036 R_{rm J}$ and $M_p = 0.513 pm 0.041 M_{rm J}$ 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.

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