A Search for Exoplanets in Open Clusters and Young Associations based on TESS Objects of Interest

Abstract

Abstract We report the results of our search for planet candidates in open clusters and young stellar associations based on the Transiting Exoplanet Survey Satellite (TESS) Objects of Interest Catalog. We find one confirmed planet, one promising candidate, one brown dwarf and three unverified planet candidates in a sample of 1229 open clusters from the second Gaia data release. We discuss individual planet-star systems based on their basic parameters, membership probability and the observation notes from the ExoFOP-TESS website. We also find ten planet candidates (P > 95%) in young stellar associations by using the BANYAN Σ Multivariate Bayesian Algorithm. Among the ten candidates, five are known planetary systems. We estimate the rotation periods of the host stars using the TESS light curves and estimate their ages based on gyrochronology. Two candidates with periodic variations are likely to be young planets, but their exact memberships to young stellar associations remain unknown.