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Light Curve and Orbital Period Analysis of the Eclipsing Binary AT Peg

Published online by Cambridge University Press:  23 April 2012

Alexios Liakos ,
Panagiotis Niarchos  and
Edwin Budding
Alexios Liakos
Affiliation:
Department of Astrophysics, Astronomy and Mechanics, University of Athens, Athens, Hellas email: alliakos@phys.uoa.gr, pniarcho@phys.uoa.gr
Panagiotis Niarchos
Affiliation:
Department of Astrophysics, Astronomy and Mechanics, University of Athens, Athens, Hellas email: alliakos@phys.uoa.gr, pniarcho@phys.uoa.gr
Edwin Budding
Affiliation:
Carter Observatory & School of Chemical and Physical Sciences, Victoria University, Wellington, New Zealand Department of Physics and Astronomy, University of Canterbury, Christchurch, New Zealand email: budding@xtra.co.nz
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Abstract

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CCD photometric observations of the Algol-type eclipsing binary AT Peg have been obtained. The light curves are analyzed with modern techniques and new geometric and photometric elements are derived. A new orbital period analysis of the system, based on the most reliable timings of minima found in the literature, is presented and apparent period modulations are discussed with respect to the Light-Time effect (LITE) and secular changes in the system. The results of these analyses are compared and interpreted in order to obtain a coherent view of the system's behaviour.

Keywords

methods: data analysis(stars:) binaries (including multiple): close(stars:) binaries: eclipsingstars: evolutionstars: individual (AT Peg)
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S282: From Interacting Binaries to Exoplanets: Essential Modeling Tools , July 2011 , pp. 55 - 56
Copyright
Copyright © International Astronomical Union 2012

References

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Prša, A. & Zwitter, T. 2005, ApJ, 628, 426CrossRefGoogle Scholar
Zasche, P., Liakos, A., Niarchos, P., et al. , 2009, New Astron., 14, 121CrossRefGoogle Scholar