Three Hot-Jupiters on the upper edge of the mass-radius distribution : WASP-177, WASP-181 and WASP-183
2019
We present the discovery of 3 transiting
planetsfrom the WASP survey, two
hot-Jupiters: WASP-177b (~0.5 M_Jup, ~1.6 R_Jup) in a 3.07-d orbit of a V = 12.6 K2 star, WASP-183b (~0.5 M_Jup, ~1.5 R_Jup) in a 4.11-d orbit of a V = 12.8 G9/K0 star; and one hot-
Saturn
planetWASP-181b (~0.3 M_Jup, ~1.2 R_Jup) in a 4.52-d orbit of a V = 12.9 G2 star. Each
planetis close to the upper bound of mass-radius space and has a scaled
semi-major axis, a/R_star, between 9.6 and 12.1. These lie in the transition between systems that tend to be in orbits that are well aligned with their host-star's spin and those that show a higher dispersion.
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