MASS TRANSFER AND LIGHT TIME EFFECT STUDIES FOR AU SERPENTIS

• Published in: Journal of The Korean Astronomical Society Vol. 48; no. 1; pp. 1 - 7
• Main Author: Amin, S.M.
• Format: Journal Article
• Language: English
• Published: 한국천문학회 28.02.2015
• Subjects: 천문학
• ISSN: 1225-4614; 2288-890X
• DOI: 10.5303/JKAS.2015.48.1.1

The orbital period changes of theWUMa 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 thesecondary one at a very low and decreasing rate dP/dt = −8.872× 10−8, superimposed on the sinusoidalvariation due to a third body orbiting the binary with period 42.87 ± 3.16 years, orbital eccentricitye = 0.52±0.12 and a longitude of periastron passage ! = 133◦.7±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. KCI Citation Count: 2