Tess giants transiting giants. i.: A noninflated hot jupiter orbiting a massive subgiant

摘要: While the population of confirmed exoplanets continues to grow, the sample of confirmed transiting planets around evolved stars is still limited. We present the discovery and confirmation of a hot Jupiter orbiting TOI-2184 (TIC 176956893), a massive evolved subgiant (M⋆= 1.53±0.12 M⊙, R⋆= 2.90±0.14 R⊙) in the Transiting Exoplanet Survey Satellite (TESS) Southern Continuous Viewing Zone. The planet was flagged as a false positive by the TESS Quick-Look Pipeline due to periodic systematics introducing a spurious depth difference between even and odd transits. Using a new pipeline to remove background scattered light in TESS Full Frame Image data, we combine space-based TESS photometry, ground-based photometry, and ground-based radial velocity measurements to report a planet radius of R p= 1.017±0.051 R J and mass of M p= 0.65±0.16 M J. For a planet so close to its star, the mass and radius …