[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.5303/JKAS.2015.48.1.1

MASS TRANSFER AND LIGHT TIME EFFECT STUDIES FOR AU SERPENTIS

Amin, S.M. (National Research Institute of Astronomy and Geophysics (NRIAG))

Publication Information

Journal of The Korean Astronomical Society / v.48, no.1, 2015 , pp. 1-7 More about this Journal

Abstract

The orbital period changes of the W UMa eclipsing binary AU Ser are studied using the (O-C) method. We conclude that the period variation is due to mass transfer from the primary star to the secondary one at a very low and decreasing rate $dP/dt=-8.872{\times}10^{-8}$ , superimposed on the sinusoidal variation due to a third body orbiting the binary with period $42.87{\pm}3.16$ years, orbital eccentricity $e=0.52{\pm}0.12$ and a longitude of periastron passage ${\omega}=133^{\circ}.7{\pm}15$ . On studying the magnetic activity, we have concluded that the Applegate mechanism failed to describe the cycling variation of the (O-C) diagram of AU Ser.

Keywords

binaries: eclipsing; binaries: close; stars: triple; stars: individual: AU Ser;

Citations & Related Records

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