TOI-150: A transiting hot Jupiter in the TESS southern CVZ

Abstract

We report the detection of a hot Jupiter ($M_p=1.75_{-0.17}^{+0.14}{M}_J$, $R_p=1.38\pm 0.04R_J$) orbiting a middle-aged star ($\log g=4.152_{-0.043}^{+0.030}$) in the Transiting Exoplanet Survey Satellite (TESS) southern continuous viewing zone (${\hat{I}}^2=-79.59^{\circ }$). 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.

13 pages, 3 figures, 2 tables, accepted to ApJL