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 d, the reference epoch of transit is 2455186.01879 +/- 0.00054 (BJD), and the transit duration is 0.0705 +/- 0.0019 d. 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 Msun and radius is 0.90 +/- 0.04 Rsun. For the planetary companion we determine a mass of 0.660 +/- 0.033 MJ and radius of 1.038 +0.077 -0.058 RJ. For the 30 known transiting exoplanets between 0.3 MJ and 0.8 MJ, 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.
@article{arxiv.1101.3511,
title = {HAT-P-27b: A hot Jupiter transiting a G star on a 3 day orbit},
author = {Bence Béky and Gáspár Á. Bakos and Joel Hartman and Guillermo Torres and David W. Latham and Andres Jordán and Pamela Arriagada and Daniel Bayliss and László L. Kiss and Géza Kovács and Sam N. Quinn and Geoffrey W. Marcy and Andrew W. Howard and Debra A. Fischer and John A. Johnson and Gilbert A. Esquerdo and Robert W. Noyes and Lars A. Buchhave and Dimitar D. Sasselov and Robert P. Stefanik and Gopakumar Perumpilly and József Lázár and István Papp and Pál Sári},
journal= {arXiv preprint arXiv:1101.3511},
year = {2015}
}
Comments
Submitted to ApJ on 2011-01-18. 12 pages, 7 figures, 7 tables