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

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    37 Citations (Scopus)

    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
    Publication statusPublished - 10 Jun 2011

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