Three Hot-Jupiters on the upper edge of the mass-radius distribution: WASP-177, WASP-181 and WASP-183

Maxted; Smalley; Hellier

Abstract

We present the discovery of 3 transiting planets from the WASP survey, two hot-Jupiters: WASP-177 b (~0.5 MJup, ~1.6 RJup) in a 3.07-d orbit of a V = 12.6 K2 star, WASP-183 b (~0.5 MJup, ~1.5 RJup) in a 4.11-d orbit of a V = 12.8 G9/K0 star; and one hot-Saturn planet WASP-181 b (~0.3 MJup, ~1.2 RJup) in a 4.52-d orbit of a V = 12.9 G2 star. Each planet is close to the upper bound of mass-radius space and has a scaled semi-major axis, a/R*, 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.

Citation

Maxted, Smalley, & Hellier. (2019). Three Hot-Jupiters on the upper edge of the mass-radius distribution: WASP-177, WASP-181 and WASP-183. Monthly Notices of the Royal Astronomical Society, 5790-5799. https://doi.org/10.1093/mnras/stz742

• Acceptance Date: Mar 14, 2019
• Publication Date: Jun 1, 2019
• Journal: Monthly Notices of the Royal Astronomical Society
• Print ISSN: 0035-8711
• Publisher: Oxford University Press
• Pages: 5790-5799
• DOI: https://doi.org/10.1093/mnras/stz742
• Keywords: planets and satellites, detection, individual, WASP-177b, WASP-181b, individual, WASP-183b
• Publisher URL: https://doi.org/10.1093/mnras/stz742