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Kepler-14b
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Title: Kepler-14b: A massive hot Jupiter transiting an F star in a close visual binary
Authors: Lars A. Buchhave, David W. Latham, Joshua A. Carter, Jean-Michel Désert, Guillermo Torres, Elisabeth R. Adams, Stephen T. Bryson, David B. Charbonneau, David R. Ciardi, Craig Kulesa, Andrea K. Dupree, Debra A. Fischer, François 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, et al. (5 additional authors not shown)

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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