HAT-P-16b: A 4 MJ planet transiting a bright star on an eccentric orbit

L. A. Buchhave, G. A. Bakos, J. D. Hartman, G. Torres, G. Kovács, D. W. Latham, R. W. Noyes, G. A. Esquerdo, M. Everett, A. W. Howard, G. W. Marcy, D. A. Fischer, J. A. Johnson, J. Andersen, G. Furész, G. Perumpilly, D. D. Sasselov, R. P. Stefanik, B. Béky, J. LázárI. Papp, P. Sári

Research output: Contribution to journalArticlepeer-review

246 Scopus citations


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 (BJD10), 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 MJ and radius of 1.289 ± 0.066 RJ, yielding a mean density of 2.42 ± 0.35 gcm-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.

Original languageEnglish (US)
Pages (from-to)1118-1125
Number of pages8
JournalAstrophysical Journal
Issue number2
StatePublished - Sep 10 2010
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


  • Planetary systems
  • Stars: individual (HAT-P-16, GSC 2792-01700)
  • Techniques: photometric
  • Techniques: spectroscopic


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