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. StefanikG. Perumpilly, J. Lázár, I. Papp, P. Sári

Research output: Contribution to journalArticlepeer-review

36 Scopus citations


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 (US)
Article number109
JournalAstrophysical Journal
Issue number2
StatePublished - Jun 10 2011
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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


Dive into the research topics of 'HAT-P-27b: A hot jupiter transiting a G star on A 3 day orbit'. Together they form a unique fingerprint.

Cite this