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Eclipsing binaries serve as a valuable source of stellar masses and radiithat inform stellar evolutionary models and provide insight into additionalastrophysical processes. The exquisite light curves generated by space-basedmissions such as Kepler offer the most stringent tests to date. We use theKepler light curve of the 4.8-day eclipsing binary KIC 5739896 with groundbased optical spectra to derive fundamental parameters for the system. Wereconstruct the component spectra to determine the individual atmosphericparameters, and model the Kepler photometry with the binary synthesis code ELCto obtain accurate masses and radii. The two components of KIC 5738698 areF-type stars with M1 = 1.39+/-0.04M, M2 = 1.34+/-0.06M, and R1 = 1.84+/-0.03R,R2 = 1.72+/-0.03R. We also report a small eccentricity (e < 0.0017) and unusualalbedo values that are required to match the detailed shape of the Kepler lightcurve. Comparisons with evolutionary models indicate an approximate age of 2.3Gyr for the system.

Fundamental Parameters of Kepler Eclipsing Binaries. I. KIC 5738698