WASP-186 and WASP-187: two hot Jupiters discovered by SuperWASP and SOPHIE with additional observations by TESS

TL;DR

This paper reports the discovery and characterization of two new hot Jupiters, WASP-186b and WASP-187b, using data from WASP, SOPHIE, and TESS, including detailed stellar and planetary parameters.

Contribution

The study presents the first detailed characterization of two hot Jupiters discovered by WASP, combining spectroscopic, photometric, and modeling analyses to determine their properties.

Findings

WASP-186b is a massive Jupiter with a 5.03-day eccentric orbit.

WASP-187b is a low-density planet with a 5.15-day circular orbit.

Both planets orbit early F-type stars, expanding the known diversity of hot Jupiters.

Abstract

We present the discovery of two new hot Jupiters identified from the WASP survey, WASP-186b and WASP-187b (TOI-1494.01 and TOI-1493.01). Their planetary nature was established from SOPHIE spectroscopic observations, and additional photometry was obtained from TESS. Stellar parameters for the host stars are derived from spectral line, IRFM, and isochrone placement analyses. These parameters are combined with the photometric and radial velocity data in an MCMC method to determine the planetary properties. WASP-186b is a massive Jupiter (4.22 +/- 0.18 M_J, 1.11 +/-0.03 R_J) orbiting a mid-F star on a 5.03 day eccentric (e=0.327 +/- 0.008) orbit. WASP-187b is a low density (0.80 +/- 0.09 M_J, 1.64 +/- 0.05 R_J) planet in a 5.15 day circular orbit around a slightly evolved early F-type star.