WASP-166b: a bloated super-Neptune transiting a V = 9 star. Issue 3 (10th July 2019) - Hellier, Coel
Abstract: We report the discovery of WASP-166b, a super-Neptune planet with a mass of 0.1 M Jup (1.9 M Nep ) and a bloated radius of 0.63 R Jup . It transits a V = 9.36, F9V star in a 5.44-d orbit that is aligned with the stellar rotation axis (sky-projected obliquity angle λ = 3 ± 5 deg). Variations in the radial-velocity measurements are likely the result of magnetic activity over a 12-d stellar rotation period. WASP-166b appears to be a rare object within the 'Neptune desert'.