TOI-677b: A Warm Jupiter (P = 11.2 days) on an Eccentric Orbit Transiting a Late F-type Star.

Abstract

We report the discovery of TOI-677 b, first identified as a candidate in light curves obtained within Sectors 9 and 10 of the Transiting Exoplanet Survey Satellite (TESS) mission and confirmed with radial velocities. TOI-677 b has a mass of Mp = - + 1.236 0.067 0.069 MJ, a radius of RP =1.170 0.0 3 RJ, and orbits its bright host star (V = 9.8 mag) with an orbital period of 11.23660 0.00011 d, on an eccentric orbit with e = 0.435 0.024. The host star has a mass of M = 1.181 0.058 M, a radius of R = - + 1.28 0.03 0.03 R, an age of - + 2.92 0.73 0.80 Gyr and solar metallicity, properties consistent with a main-sequence late-F star with Teff = 6295 77 K. We find evidence in the radial velocity measurements of a secondary long-term signal, which could be due to an outer companion. The TOI677 b system is a well-suited target for Rossiter–Mclaughlin observations that can constrain migration mechanisms of close-in giant planets.