EPIC229426032 b and EPIC246067459 b: discovery and characterization of two new transiting hot Jupiters from K2

TL;DR

This paper reports the discovery and detailed characterization of two new transiting hot Jupiters from the K2 mission, highlighting their physical properties and potential for further study.

Contribution

The paper presents the first discovery and characterization of two hot Jupiters using K2 photometry combined with ground-based radial velocity data.

Findings

EPIC229426032 b is a highly inflated hot Jupiter.

EPIC246067459 b's radius aligns with theoretical models.

EPIC229426032 b orbits a relatively bright star, ideal for follow-up.

Abstract

We report the discovery of two hot Jupiters orbiting the stars EPIC229426032 and EPIC246067459. We used photometric data from Campaign 11 and 12 of the Kepler K2 Mission and radial velocity data obtained using the HARPS, FEROS, and CORALIE spectrographs. EPIC229426032 b and EPIC246067459 b have masses of $1.60^{+0.11}_{-0.11}$ and $0.86^{+0.13}_{-0.12}\,M_{\mathrm{Jup}}$, radii of $1.65^{+0.07}_{-0.08}$ and $1.30^{+0.15}_{-0.14}\,R{_\mathrm{Jup}}$, and are orbiting their host stars in 2.18 and 3.20-day orbits, respectively. The large radius of EPIC229426032 b leads us to conclude that this candidate corresponds to a highly inflated hot Jupiter. EPIC2460674559 b has a radius consistent with theoretical models, considering the high incident flux falling on the planet. We consider EPIC229426032 b to be a excellent system for follow-up studies, since not only is it very inflated, but it also orbits a relatively bright star ($V = 11.6$).