Light Curve Solutions of Ten Eccentric Kepler Binaries, Three of them with Tidally Induced Humps

摘要

We carried out light curve solutions of ten detached eclipsing eccentricbinaries observed by Kepler. The formal errors of the derived parameters fromthe light curve solutions are below 1%. Our results give indications that thecomponents of the eccentric binaries (especially those with mass ratios below0.5) do not follow precisely the empirical relations between the stellarparameters derived from the study of circular-orbit binaries. We found thefollowing peculiarities of the targets: (a) the components of KIC 9474969 havealmost the same temperatures while their radii and masses differ by a factoraround 2.5; (b) KIC 6949550 reveals semi-regular light variations with anamplitude of 0.004 and a period around 7 d which are modulated by long-termvariations; (c) KIC 6220470, KIC 11071207, and KIC 9474969 exhibit tidallyinduced 'hump' around the periastron. These are the targets with the biggestrelative radii of our sample. We derived the dependence of the hump amplitudeon the relative stellar radii, eccentricity, and mass ratio of eccentric binaryconsisting of MS stars.