HAT-P-27b: A hot jupiter transiting a G star on A 3 day orbit

  • B. Béky
  • , G. Á Bakos
  • , J. Hartman
  • , G. Torres
  • , D. W. Latham
  • , A. Jordán
  • , P. Arriagada
  • , D. Bayliss
  • , L. L. Kiss
  • , Géza Kovács
  • , S. N. Quinn
  • , G. W. Marcy
  • , A. W. Howard
  • , D. A. Fischer
  • , J. A. Johnson
  • , G. A. Esquerdo
  • , R. W. Noyes
  • , L. A. Buchhave
  • , D. D. Sasselov
  • , R. P. Stefanik
  • G. Perumpilly, J. Lázár, I. Papp, P. Sári

Research output: Contribution to journalArticlepeer-review

39 Scopus citations

Abstract

We report the discovery of HAT-P-27b, an exoplanet transiting the moderately bright G8 dwarf star GSC 0333-00351 (V = 12.214). The orbital period is 3.039586 ± 0.000012 days, the reference epoch of transit is 2455186.01879 ± 0.00054 (BJD), and the transit duration is 0.0705 ± 0.0019 days. The host star with its effective temperature 5300 ± 90 K is somewhat cooler than the Sun and is more metal-rich with a metallicity of +0.29 ± 0.10. Its mass is 0.94 ± 0.04 M and radius is 0.90+0.05 - 0.04 R. For the planetary companion we determine a mass of 0.660 ± 0.033 M J and radius of 1.038+0.077 - 0.058 R J. For the 30 known transiting exoplanets between 0.3 M J and 0.8 M J, a negative correlation between host star metallicity and planetary radius and an additional dependence of planetary radius on equilibrium temperature are confirmed at a high level of statistical significance.

Original languageEnglish
Article number109
JournalAstrophysical Journal
Volume734
Issue number2
DOIs
StatePublished - 10 Jun 2011
Externally publishedYes

Keywords

  • planetary systems
  • stars: individual (HAT-P-27, GSC 0333-00351)
  • techniques: photometric
  • techniques: spectroscopic

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