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Period–eccentricity distribution of eccentric eclipsing binaries (eEB) has inevitable importance in the study of the different kinds of tidal circularization (and synchronization) processes. Recent space missions provide a large amount of continuous and precise light curves, which enable us to determine several accurate stellar and dynamical parameters for thousands of freshly discovered eEBs. For statistical analysis we developed a fast, automated, although approximating method for determining eccentricity and argument of periastron from the displacement of the secondary minima and the difference of primary and secondary eclipse durations for large samples of eclipsing lightcurves. Applying this method to several hundreds of recently discovered eEBs in the fields of the primordial and secondary  Kepler  and also the  CoRoT  missions, we present a comprehensive statistical analysis of the period–eccentricity relation for different subgroups of these double star systems.

Statistical analysis of period-eccentricity distribution for large samples of close binaries from Kepler, CoRoT and SB9 databases