Orbital Elements and Absolute Dimensions of the Eclipsing Binary ES Librae

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

ES Librae is a 7th magnitude, semi-detached eclipsing binary system with a 21-hour period. We present new UBV differential photometry as well as new radial velocity measurements. The three light curves, radial velocities, and previously published data were solved simultaneously using the Wilson-Devinney program to establish the definitive solution of the system. We determine orbital elements and absolute dimensions including the masses, radii, and temperatures, and we also investigate period changes based on previously published times of minima.

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