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Radio observations of the massive stellar cluster Westerlund 1

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High-dynamic range radio observations of Westerlund 1 (Wd 1) are presented that detect a total of 21 stars in the young massive stellar cluster, the richest population of radio emitting stars known for any young massive galactic cluster in the Galaxy. We will discuss some of the more remarkable objects, including the highly radio luminous supergiant B[e] star W9, with an estimated mass-loss rate ( 10

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