摘要：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 ${\text{}}{M}_{{\text{}}p}$ = ${1.236}_{-0.067}^{+0.069}$ ${\text{}}{M}_{{\rm{J}}}$, a radius of ${\text{}}{R}_{{\text{}}P}$ = $1.170\pm 0.03$ ${\text{}}{R}_{{\rm{J}}}$, and orbits its bright host star (V = 9.8 mag) with an orbital period of $11.23660\pm 0.00011$ d, on an eccentric orbit with $e=0.435\pm 0.024$.The host star has a mass of ${\text{}}{M}_{\star }$ = $1.181\pm 0.058$ ${\text{}}{M}_{\odot }$, a radius of ${\text{}}{R}_{\star }$ = ${1.28}_{-0.03}^{+0.03}$ ${\text{}}{R}_{\odot }$, an age of ${2.92}_{-0.73}^{+0.80}$ Gyr and solar metallicity, properties consistent with a main-sequence late-F star with ${T}_{\mathrm{eff}}=6295\pm 77$ K.We find evidence in the radial velocity measurements of a secondary long-term signal, which could be due to an outer companion.The TOI-677 b system is a well-suited target for Rossiter–Mclaughlin observations that can constrain migration mechanisms of close-in giant planets.
关键词：Exoplanets;Extrasolar gas giants;Exoplanet astronomy;Transit photometry;Radial velocity;Planet hosting stars
