HATS-9b and HATS-10b: Two Compact Hot Jupiters in Field 7 of the K2 Mission

Abstract

We report the discovery of two transiting extrasolar planets by the HATSouth survey. HATS-9b orbits an old (10.8 $\pm$ 1.5 Gyr) V=13.3 G dwarf star, with a period P = 1.9153 d. The host star has a mass of 1.03 M${}_{\odot }$, radius of 1.503 R${}_{\odot }$ and effective temperature 5366 $\pm$ 70 K. The planetary companion has a mass of 0.837 M${}_J$, and radius of 1.065 R${}_J$ yielding a mean density of 0.85 g cm${}^{-3}$ . HATS-10b orbits a V=13.1 G dwarf star, with a period P = 3.3128 d. The host star has a mass of 1.1 M${}_{\odot }$, radius of 1.11 R${}_{\odot }$ and effective temperature 5880 $\pm$ 120 K. The planetary companion has a mass of 0.53 M${}_J$, and radius of 0.97 R${}_J$ yielding a mean density of 0.7 g cm${}^{-3}$ . Both planets are compact in comparison with planets receiving similar irradiation from their host stars, and lie in the nominal coordinates of Field 7 of K2 but only HATS-9b falls on working silicon. Future characterisation of HATS-9b with the exquisite photometric precision of the Kepler telescope may provide measurements of its reflected light signature.

15 pages, 10 figures, accepted for publication in AJ

References in corpus (12)

• The K2 Mission: Characterization and Early results
• EXOFAST: A fast exoplanetary fitting suite in IDL
• A Technique for Extracting Highly Precise Photometry for the Two-Wheeled Kepler Mission
• Improving Stellar and Planetary Parameters of Transiting Planet Systems: The Case of TrES-2
• Water Vapour Absorption in the Clear Atmosphere of an exo-Neptune
• HAT-P-7b: An Extremely Hot Massive Planet Transiting a Bright Star in the Kepler Field
• HD147506b: A Super-Massive Planet in an Eccentric Orbit Transiting a Bright Star
• TrES-2: The First Transiting Planet in the Kepler Field
• A nearby M star with three transiting super-Earths discovered by K2
• Precise time-series photometry for the Kepler-2.0 mission
• Most Sub-Arcsecond Companions of Kepler Exoplanet Candidate Host Stars are Gravitationally Bound
• High-resolution Multi-band Imaging for Validation and Characterization of Small Kepler Planets

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