• DOI:10.1088/0004-637X/724/2/866
• Corpus ID: 119207125

HAT-P-15b: A 10.9 DAY EXTRASOLAR PLANET TRANSITING A SOLAR-TYPE STAR

@article{Kovacs2010HATP15bA1,
  title={HAT-P-15b: A 10.9 DAY EXTRASOLAR PLANET TRANSITING A SOLAR-TYPE STAR},
  author={G'abor Kov'acs and G{\'a}sp{\'a}r {\'A}. Bakos and Joel D. Hartman and Guillermo Torres and Robert W. Noyes and David W. Latham and Andrew W. Howard and D. A. Fischer and J. A. Johnson and Geoffrey W. Marcy and Howard T. Isaacson and Dimitar D. Sasselov and Robert P. Stefanik and Gilbert A. Esquerdo and J. M. Fern{\'a}ndez and B. B{\'e}ky J. L{\'a}z{\'a}r and Istv{\'a}n Papp and P'al S'ari},
  journal={The Astrophysical Journal},
  year={2010},
  volume={724},
  pages={866 - 877}
}

• G. Kov'acs, G. Bakos, +15 authors P. S'ari
• Published 28 May 2010
• Physics, Geology
• The Astrophysical Journal

We report the discovery of HAT-P-15b, a transiting extrasolar planet in the “period valley,” a relatively sparsely populated period regime of the known extrasolar planets. The host star, GSC 2883-01687, is a G5 dwarf with V= 12.16. It has a mass of 1.01 ± 0.04 M☉, radius of 1.08 ± 0.04 R☉, effective temperature 5568 ± 90 K, and metallicity [Fe/H] = +0.22 ± 0.08. The planetary companion orbits the star with a period P = 10.863502 ± 0.000027 days, transit epoch Tc = 2454638.56019 ± 0.00048 (BJD), and transit duration 0.2285 ± 0.0015 days. It has a mass of 1.946 ± 0.066 MJ and radius of 1.072 ± 0.043 RJ yielding a mean density of 1.96 ± 0.22 g cm-3. At an age of 6.8+2.5−1.6 Gyr, the planet is H/He-dominated and theoretical models require about 2% (10 M⊕) worth of heavy elements to reproduce its measured radius. With an estimated equilibrium temperature of ∼820 K during transit, and ∼1000 K at occultation, HAT-P-15b is a potential candidate to study moderately cool planetary atmospheres by transmission and occultation spectroscopy.