HATS-13b and HATS-14b: two transiting hot Jupiters from the HATSouth survey

TL;DR

This paper reports the discovery of two hot Jupiters, HATS-13b and HATS-14b, from the HATSouth survey, highlighting their differing physical characteristics despite similar host stars and irradiation levels.

Contribution

First discovery of two transiting hot Jupiters from the HATSouth survey with detailed characterization of their physical properties.

Findings

HATS-13b is an inflated planet with a radius of 1.212 RJ.

HATS-14b is a more compact planet with a radius of 1.039 RJ.

Both planets orbit their host stars roughly every 3 days.

Abstract

We report the discovery of HATS-13b and HATS-14b, two hot-Jupiter transiting planets discovered by the HATSouth survey. The host stars are quite similar to each other (HATS-13: V = 13.9 mag, M* = 0.96 Msun, R* = 0.89 Rsun, Teff = 5500 K, [Fe/H] = 0.05; HATS-14: V = 13.8 mag, M* = 0.97 Msun, R* = 0.93 Rsun, Teff = 5350 K, [Fe/H] = 0.33) and both the planets orbit around them with a period of roughly 3 days and a separation of roughly 0.04 au. However, even though they are irradiated in a similar way, the physical characteristics of the two planets are very different. HATS-13b, with a mass of Mp = 0.543 MJ and a radius of Rp = 1.212 RJ, appears as an inflated planet, while HATS-14b, having a mass of Mp = 1.071 MJ and a radius of Rp = 1.039 RJ, is only slightly larger in radius than Jupiter.