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Kepler-14b: A massive hot Jupiter transiting an F star in a close visual binary

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arxiv 1106.5510 v1 pith:GCMTUQGD submitted 2011-06-27 astro-ph.EP

Kepler-14b: A massive hot Jupiter transiting an F star in a close visual binary

Lars A. Buchhave , David W. Latham , Joshua A. Carter , Jean-Michel D\'esert , Guillermo Torres , Elisabeth R. Adams , Stephen T. Bryson , David B. Charbonneau
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David R. Ciardi Craig Kulesa Andrea K. Dupree Debra A. Fischer Fran\c{c}ois Fressin Thomas N. Gautier III Ronald L. Gilliland Steve B. Howel Howard Isaacson Jon M. Jenkins Geoffrey W. Marcy Donald W. McCarthy Jason F. Rowe Natalie M. Batalha William J. Borucki Timothy M. Brown Douglas A. Caldwell Jessie L. Christiansen William D. Cochran Drake Deming Edward W. Dunham Mark Everett Eric B. Ford Jonathan J. Fortney John C. Geary Forrest R. Girouard Michael R. Haas Matthew J. Holman Elliott Horch Todd C. Klaus Heather A. Knutson David G. Koch Jeffrey Kolodziejczak Jack J. Lissauer Pavel Machalek Fergal Mullally Martin D. Still Samuel N. Quinn Sara Seager Susan E. Thompson Jeffrey Van Cleve
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keywords starbinaryclosederiveddilutionjupiterkepler-14bmass
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We present the discovery of a hot Jupiter transiting an F star in a close visual (0.3" sky projected angular separation) binary system. The dilution of the host star's light by the nearly equal magnitude stellar companion (~ 0.5 magnitudes fainter) significantly affects the derived planetary parameters, and if left uncorrected, leads to an underestimate of the radius and mass of the planet by 10% and 60%, respectively. Other published exoplanets, which have not been observed with high-resolution imaging, could similarly have unresolved stellar companions and thus have incorrectly derived planetary parameters. Kepler-14b (KOI-98) has a period of P = 6.790 days and correcting for the dilution, has a mass of Mp = 8.40 +0.19-0.18 MJ and a radius of Rp = 1.136 +0.073-0.054 RJ, yielding a mean density of rho = 7.1 +- 1.1 g cm-3.

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