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

## TL;DR

This paper reports the discovery and confirmation of a hot Jupiter exoplanet orbiting a star in the TESS southern CVZ, using combined space-based and ground-based observations, highlighting the utility of large spectroscopic surveys in exoplanet confirmation.

## Contribution

First confirmation of a hot Jupiter in TESS southern CVZ using APOGEE-2 and other ground-based data, demonstrating the effectiveness of large spectroscopic surveys for exoplanet detection.

## Key findings

- Confirmed the planetary nature of TOI-150.01 with radial velocity data.
- Demonstrated the capability of APOGEE-2 to confirm giant exoplanets.
- Identified potential for additional planets through continued TESS monitoring.

## Abstract

We report the detection of a hot Jupiter ($M_{p}=1.75_{-0.17}^{+0.14}\ M_{J}$, $R_{p}=1.38\pm0.04\ R_{J}$) orbiting a middle-aged star ($\log g=4.152^{+0.030}_{-0.043}$) in the Transiting Exoplanet Survey Satellite (TESS) southern continuous viewing zone ($\beta=-79.59^{\circ}$). 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.