Monitoring Changes in Eclipsing Binary Orbits

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Scientific paper

Times of light minimum were determined from observations of seven eclipsing binaries, EP AND, WZ AND, AH TAU, HP AUR, ZZ AUR, GO CYG and UV LEO. Based on these new times of minimum and those collected from the literature, changes in the orbital period of the systems were found and are presented. The literature contains hundreds of papers, which include proposed explanations for these period changes. Most involve apsidal motion, motion around another star (third body), mass transfer between stars, mass loss, magnetic cycles, and braking and angular momentum loss. When identifying an orbital period change in these systems and one of these common mechanism appears to be a feasible or satisfactory hypothesis, we applied the explanation to the occurring orbital changes where system parameters were available.

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