A Revision of the Ephemeris-Curve Equations for Eclipsing Binaries with Apsidal Motion

摘要: An improved expression for the prediction of eclipse times in eccentric eclipsing binaries showing apsidal motion is presented. Truncated series expansions have been extended to take into account up sixth power eccentricity, and all calculations thoroughly checked by means Mathematica computer tool. This supersedes previous equations Gimenez & Garcia-Pelayo (1983). A new description process derive given made order facilitate verification numerous terms involved as well correct some misprints which were found our first paper. Nevertheless, despite doubts due difficulty check involved, Equation 20 (1983) has confirmed be free and, claimed, was accurate fifth eccentricity. equation adopted many authors their analysis elements.