HATS-50b through HATS-53b: four transiting hot Jupiters orbiting G-type stars discovered by the HATSouth survey

TL;DR

This paper reports the discovery of four new hot Jupiter exoplanets orbiting G-type stars using the HATSouth survey, highlighting their physical characteristics and potential for further study with TESS.

Contribution

First discovery of four transiting hot Jupiters from the HATSouth survey, expanding knowledge of close-in gas giant exoplanets around G-type stars.

Findings

Three exoplanets have low density and similar orbital periods.

HATS-52 is denser with a shorter orbital period and higher temperature.

HATS-50 may host an ultra-short period hot super Neptune.

Abstract

We report the discovery of four close-in transiting exoplanets, HATS-50 through HATS-53, discovered using the HATSouth three-continent network of homogeneous and automated telescopes. These new exoplanets belong to the class of hot Jupiters and orbit G-type dwarf stars, with brightness in the range V=12.5-14.0 mag. While HATS-53 has many physical characteristics similar to the Sun, the other three stars appear to be metal rich, larger and more massive. Three of the new exoplanets, namely HATS-50, HATS-51 and HATS-53, have low density and similar orbital period. Instead, HATS-52 is more dense and has a shorter orbital period. It also receives an intensive radiation from its parent star and, consequently, presents a high equilibrium temperature. HATS-50 shows a marginal additional transit feature consistent with an ultra-short period hot super Neptune, which will be able to be confirmed with TESS photometry.