HAT-P-16b: A 4 Mj Planet Transiting A Bright Star On An Eccentric Orbit

Authors :: Buchhave, L. A.
Bakos, G. A.
Hartman, J. D.
Torres, G.
Kovacs, G.
Latham, D. W.
Noyes, R. W.
Esquerdo, G. A.
Everett, M.
Howard, A. W.
Marcy, G. W.
Fischer, D. A.
Johnson, J. A.
Andersen, J.
Furesz, G.
Perumpilly, G.
Sasselov, D. D.
Stefanik, R. P.
Beky, B.
Lazar, J.
Papp, I.
Sari, P.
Publication Year :: 2010
Abstract: We report the discovery of HAT-P-16b, a transiting extrasolar planet orbiting the V = 10.8 mag F8 dwarf GSC 2792-01700, with a period P = 2.775960 +- 0.000003 d, transit epoch Tc = 2455027.59293 +- 0.00031 (BJD), and transit duration 0.1276 +- 0.0013 d. The host star has a mass of 1.22 +- 0.04 Msun, radius of 1.24 +- 0.05 Rsun, effective temperature 6158 +-80 K, and metallicity [Fe/H] = +0.17 +- 0.08. The planetary companion has a mass of 4.193 +- 0.094 MJ, and radius of 1.289 +- 0.066 RJ yielding a mean density of 2.42 +- 0.35 g/cm3. Comparing these observed characteristics with recent theoretical models, we find that HAT-P-16b is consistent with a 1 Gyr H/He-dominated gas giant planet. HAT-P-16b resides in a sparsely populated region of the mass{radius diagram and has a non-zero eccentricity of e = 0.036 with a significance of 10 sigma.<br />Comment: Submitted to ApJ