K2-113: a dense hot Jupiter transiting a solar analogue

Abstract

We present the discovery of K2-113, a dense hot-Jupiter discovered using photometry from Campaign 8 of theKepler-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(-0.07)(+ 0.10) RJ and a mass of 1.29(-0.14)(+ 0.13) MJ. 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 M-J and Teq > 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 similar to 110 M circle plus or greater.