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A Period Study of the Close Binary V508 Ophiuchi

Published online by Cambridge University Press:  05 March 2013

Berahitdin Albayrak
Berahitdin Albayrak*
Affiliation:
Ankara University, Department of Astronomy and Space Sciences, 06100, Tandoğan, Ankara, Turkey. Email: albayrak@astro1.science.ankara.edu.tr
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Abstract

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The short-period (0d.34) close binary V508 Oph was observed in 2005 and four new times of minima were derived. All of the available times of minima, including the new ones, covering 69 years were analyzed. It was shown that the period change of the system is very complex. Two possible period oscillations with periods of 24.73 and 9.91 years and amplitudes of about 0.011 and 0.002 day, respectively, were found to superimpose on upward parabolic change, indicating a secular period increase at a rate of dp/dt = 4.24 × 10−9 days yr−1. The mechanisms that could explain the period changes of the system are discussed.

Keywords

stars: binaries: eclipsingstars: individual: V508 Oph
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 22 , Issue 4 , 2005 , pp. 311 - 314
Copyright
Copyright © Astronomical Society of Australia 2005

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