Ritchie, B. W.; Clark, J. S. and Negueruela, I.
The massive binary population of the starburst cluster Westerlund 1.
Bulletin de la Societe Royales des Sciences de Liège, 80
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We present initial results from a long-baseline radial velocity survey for massive binaries in the cluster Westerlund 1. Four systems are examined: the dust-producing WC binary W239, the double-lined eclipsing binary W13, and the single-lined B0 supergiants W43a and W3003. Finally, the evolutionary implications for the population of massive stars in Westerlund 1 are discussed.
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