TOI-150: A Transiting Hot Jupiter in the TESS Southern CVZ*

Abstract

Abstract We report the detection of a hot Jupiter ( , R p = 1.38 ± 0.04 R J ) orbiting a middle-aged star ( ) in the Transiting Exoplanet Survey Satellite ( TESS ) southern continuous viewing zone ( β = −79.°59). We confirm the planetary nature of the candidate TOI-150.01 using radial velocity observations from the APOGEE-2 South spectrograph and the Carnegie Planet Finder Spectrograph, ground-based photometric observations from the robotic Three-hundred MilliMeter Telescope at Las Campanas Observatory, and Gaia distance estimates. Large-scale spectroscopic surveys, such as APOGEE/APOGEE-2, now have sufficient radial velocity precision to directly confirm the signature of giant exoplanets, making such data sets valuable tools in the TESS era. Continual monitoring of TOI-150 by TESS can reveal additional planets and subsequent observations can provide insights into planetary system architectures involving a hot Jupiter around a star about halfway through its main-sequence life.