K2-113: a dense hot-Jupiter transiting a solar analogue
Jordán, Andrés; Espinoza, Néstor; Brahm, Rafael; Jenkins, James S.; Hartman, Joel D.; Rabus, Markus; Jones, Matías; Rojas, Felipe; Drass, Holger; Vučković, Maja; Cortés, Cristián
Chile, Germany, United States
Abstract
We present the discovery of K2-113, a dense hot-Jupiter discovered using photometry from Campaign 8 of the Kepler-2 (K2) mission and high-resolution spectroscopic follow-up obtained with the FEROS spectrograph. The planet orbits a V = 13.68 solar analogue in a P=5.817 60^{+0.000 03}_{-0.000 03} d orbit, and has a radius of 0.93^{+0.10}_{-0.07}R_J and a mass of 1.29^{+0.13}_{-0.14}M_J. With a density of 1.97^{+0.60}_{-0.53} g cm-3, the planet is among the densest systems known having masses below 2 MJ and T_eq > 1000, and is just above the temperature limit at which inflation mechanisms are believed to start being important. Based on its mass and radius, we estimate that K2-113 should have a heavy element content of the order of ∼110 M⊕ or greater.