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Fundamental Parameters of Four Massive Eclipsing Binaries in Westerlund 1

Published online by Cambridge University Press:  23 April 2012

E. Koumpia  and
A. Z. Bonanos
E. Koumpia
Affiliation:
National Observatory of Athens, Institute of Astronomy & Astrophysics, I. Metaxa & Vas. Pavlou St., Palaia Penteli GR-15236 Athens, [email protected], [email protected]
A. Z. Bonanos
Affiliation:
National Observatory of Athens, Institute of Astronomy & Astrophysics, I. Metaxa & Vas. Pavlou St., Palaia Penteli GR-15236 Athens, [email protected], [email protected]
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Abstract

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We present fundamental parameters of four massive eclipsing binaries in the young massive cluster Westerlund 1. The goal is to measure accurate masses and radii of their component stars, which provide much needed constraints for evolutionary models of massive stars. Accurate parameters can further be used to determine a dynamical lower limit for the magnetar progenitor and to obtain an independent distance to the cluster. Our results confirm and extend the evidence for a high mass for the progenitor of the magnetar.

Keywords

open clusters and associations: individual (Westerlund 1)stars: fundamental parametersstars: early-typebinaries: eclipsingstars: Wolf-Rayet
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. 307 - 308
Copyright
Copyright © International Astronomical Union 2012

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