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

Abstract

We present the discovery of K2-113b, 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 $P=5.81760_{-0.00003}^{+0.00003}$ day orbit, has a radius of $0.93_{-0.07}^{+0.10}{R}_J$ and a mass of $1.29_{-0.14}^{+0.13}{M}_J$. With a density of $1.97_{-0.53}^{+0.60}$ gr/cm${}^3$, the planet is among the densest systems known having masses below 2 $M_J$ 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 K2-113b should have a heavy element content on the order of $\sim$ 110 $M_{\oplus }$ or greater.

8 pages, 7 figures. Accepted to MNRAS; added new photometry from newest version of EVEREST, which allows for a constrain on the secondary eclipse depth

References in corpus (11)

• MESA Isochrones and Stellar Tracks (MIST). I: Solar-Scaled Models
• Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties
• The Dartmouth Stellar Evolution Database
• Astrophysics Source Code Library
• Limb darkening and exoplanets: testing stellar model atmospheres and identifying biases in transit parameters
• EVEREST: Pixel Level Decorrelation of K2 Light curves
• CERES: A Set of Automated Routines for Echelle Spectra
• 197 Candidates and 104 Validated Planets in K2's First Five Fields
• WASP-South transiting exoplanets: WASP-130b, WASP-131b, WASP-132b, WASP-139b, WASP-140b, WASP-141b & WASP-142b
• ZASPE: A Code to Measure Stellar Atmospheric Parameters and their Covariance from Spectra
• HATS-9b and HATS-10b: Two Compact Hot Jupiters in Field 7 of the K2 Mission

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• EPIC 201498078b: A low density Super Neptune on an eccentric orbit
• K2-287b: an Eccentric Warm Saturn transiting a G-dwarf
• Revealing a main-sequence star that consumed a planet with JWST