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

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

2011-06-27

arxiv.org/abs/1106.5510v1

Astronomy and Astrophysics

Astrophysics

Earth and Planetary Astrophysics

10 pages, 8 figures, submitted to ApJ

Scientific paper

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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