Key points are not available for this paper at this time.
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 days, transit epoch Tc = 2455027. 59293 ± 0. 00031 (BJD^ (10) ), and transit duration 0. 1276 ± 0. 0013 days. The host star has a mass of 1. 22 ± 0. 04 M ⊙, radius of 1. 24 ± 0. 05 R ⊙, effective temperature 6158 ± 80 K, and metallicity Fe/H = +0. 17 ± 0. 08. The planetary companion has a mass of 4. 193 ± 0. 094 M J and radius of 1. 289 ± 0. 066 R J, yielding a mean density of 2. 42 ± 0. 35 g cm^ (–3). 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 10σ.
Buchhave et al. (2010) studied this question.