HATS-5b: A Transiting hot-Saturn from the HATSouth Survey

G. Zhou , D. Bayliss , K. Penev , G. \'A. Bakos , J. D. Hartman , A. Jord\'an , L. Mancini , M. Mohler

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Z. Csubry S. Ciceri R. Brahm M. Rabus L. Buchhave T. Henning V. Suc N. Espinoza B. B\'eky R. W. Noyes B. Schmidt R. P. Butler S. Shectman I. Thompson J. Crane B. Sato B. Cs\'ak J. L\'az\'ar I. Papp P. S\'ari N. Nikolov

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classification 🌌 astro-ph.EP

keywords radiushats-5bstarhostclose-independenceequilibriumfind

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We report the discovery of HATS-5b, a transiting hot-Saturn orbiting a G type star, by the HAT-South survey. HATS-5b has a mass of Mp=0.24 Mj, radius of Rp=0.91 Rj, and transits its host star with a period of P=4.7634d. The radius of HATS-5b is consistent with both theoretical and empirical models. The host star has a V band magnitude of 12.6, mass of 0.94 Msun, and radius of 0.87 Rsun. The relatively high scale height of HATS-5b, and the bright, photometrically quiet host star, make this planet a favourable target for future transmission spectroscopy follow-up observations. We reexamine the correlations in radius, equilibrium temperature, and metallicity of the close-in gas-giants, and find hot Jupiter-mass planets to exhibit the strongest dependence between radius and equilibrium temperature. We find no significant dependence in radius and metallicity for the close-in gas-giant population.

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HATS-5b: A Transiting hot-Saturn from the HATSouth Survey

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