WASP-166b: a bloated super-Neptune transiting a V  = 9 star. Issue 3 (10th July 2019)

• Record Type: Journal Article
• Authors: Hellier, Coel; Anderson, D R; Triaud, A H M J; Bouchy, F; Burdanov, A; Collier Cameron, A; Delrez, L; Ehrenreich, D; Gillon, M; Jehin, E; Lendl, M; Linder, E; Nielsen, L D; Maxted, P F L; Pepe, F; Pollacco, D; Queloz, D; Ségransan, D; Smalley, B; Spake, J J; Temple, L Y; Udry, S; West, R G; Wyttenbach, A
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 488:Issue 3(2019)
• Page Start: 3067
• Page End: 3075
• Publication Date: 2019-07-10
• Subjects: stars: individual: (WASP-166); Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/stz1903
• Languages: English
• ISSNs: 0035-8711

Abstract

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'.