Abstract

We study the possibility of determining an orbital eccentricity of a binary star system with an exoplanet from both simulated and observed transit light curves. It has been shown that an exact value of the eccentricity can be contained from transit light curves, if the longitude of periastron is known. If the information about the longitude of periastron is not available, the analysis of the transit light curve makes it possible to impose limits on values of the orbital eccentricity. We study the influence of the uncertainty in the orbital eccentricity on the accuracy of determining the other parameters of the system (the radii of the star and the planet, the orbital inclination, and the limb darkening coefficient).

中文翻译：

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关于从凌日光曲线估计具有系外行星的双星系统轨道偏心率的可能性

摘要

我们研究了根据模拟和观测的凌日光曲线确定具有系外行星的双星系统轨道偏心率的可能性。已经表明，如果已知近星点的经度，则可以从凌日光变曲线中包含精确的偏心率值。如果无法获得近星点经度的信息，则对凌日光变曲线的分析可以对轨道偏心率的值施加限制。我们研究了轨道偏心率的不确定性对系统其他参数（恒星和行星的半径、轨道倾角和临边暗化系数）确定精度的影响。