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. Lázár
  • I. Papp, P. Sári

Research output: Contribution to journalArticlepeer-review

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 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
Volume720
Issue number2
DOIs
StatePublished - Sep 10 2010
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

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

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