WASP-166b: a bloated super-Neptune transiting a V = 9 star

Maxted; Hellier; Smalley

Abstract

We report the discovery of WASP-166b, a super-Neptune planet with a mass of 0.1 MJup (1.9 MNep) and a bloated radius of 0.63 RJup. 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 ? = 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’.

Citation

Maxted, Hellier, & Smalley. (2019). WASP-166b: a bloated super-Neptune transiting a V = 9 star. Monthly Notices of the Royal Astronomical Society, 3067 -3075. https://doi.org/10.1093/mnras/stz1903

• Acceptance Date: Jul 2, 2019
• Publication Date: Sep 1, 2019
• Journal: Monthly Notices of the Royal Astronomical Society
• Print ISSN: 0035-8711
• Publisher: Oxford University Press
• Pages: 3067 -3075
• DOI: https://doi.org/10.1093/mnras/stz1903
• Keywords: stars, individual, (WASP-166)
• Publisher URL: https://doi.org/10.1093/mnras/stz1903