AAVSO: American Association of Variable Star Observers

The Challenge of Observing the zeta Aurigae Binary Stars

Volume 42 number 2 (2014)

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Frank J. Melillo
Holtsville Observatory, 14 Glen-Hollow Dr, E-16, Holtsville, NY 11742; Frankj12@aol.com

Abstract

Observations of the z Aurigae binary stars z Aur, 31 Cyg, and 32 Cyg were made in V and B during their most recent eclipses. All three stars were measured photometrically mainly in the blue light that traces the hot companion star being eclipsed. The light curves of all three stars show precise timing during the entire recent eclipses. The magnitude and the duration of the eclipses in V and B are described here and predictions are made for the future.