HATS-5b: A TRANSITING HOT SATURN FROM THE HATSouth SURVEY

Zhou, G.; Bayliss, D.; Penev, K.; Bakos, G. A.; Hartman, J. D.; Jordan, A.; Mancini, L.; Mohler, M.; Csubry, Z.; Ciceri, S.; Brahm, R.; Rabus, M.; Buchhave, L.; Henning, T.; Suc, V.; Espinoza, N.; Beky, B.; Noyes, R. W.; Schmidt, B.; Butler, R. P.; Shectman, S.; Thompson, I.; Crane, J.; Sato, B.; Csak, B.; Lazar, J.; Papp, I.; Sari, P.; Nikolov, N.
2014
ASTRONOMICAL JOURNAL
DOI
10.1088/0004-6256/147/6/144
We report the discovery of HATS-5b, a transiting hot Saturn orbiting a G-type star, by the HATSouth survey. HATS-5b has a mass of Mp approximate to 0.24 M-J, radius of R-p approximate to 0.91 R-J, and transits its host star with a period of P approximate to 4.7634 days. 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 M-circle dot, and radius of 0.87 R-circle dot. The relatively high scale height of HATS-5b and the bright, photometrically quiet host starmake this planet a favorable 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.