paper

HATS-17b: A Transiting Compact Warm Jupiter in a 16.3 Days Circular Orbit

arXiv:1510.05758 · doi:10.3847/0004-6256/151/4/89

Abstract

We report the discovery of HATS-17b, the first transiting warm Jupiter of the HATSouth network. HATS-17b transits its bright (V=12.4) G-type (M $_{⋆}$ =1.131 $\pm$ 0.030 M $_{⊙}$ , R $_{⋆}$ =1.091 $_{- 0.046}^{+ 0.070}$ R $_{⋆}$ ) metal-rich ([Fe/H]=+0.3 dex) host star in a circular orbit with a period of P=16.2546 days. HATS-17b has a very compact radius of 0.777 $\pm$ 0.056 R $_{J}$ given its Jupiter-like mass of 1.338 $\pm$ 0.065 M $_{J}$ . Up to 50% of the mass of HATS-17b may be composed of heavy elements in order to explain its high density with current models of planetary structure. HATS-17b is the longest period transiting planet discovered to date by a ground-based photometric survey, and is one of the brightest transiting warm Jupiter systems known. The brightness of HATS-17b will allow detailed follow-up observations to characterize the orbital geometry of the system and the atmosphere of the planet.

12 page, 8 figures, submitted to AJ