A Rich Population of Massive Young Stars in the Cluster Westerlund 1

Details A Rich Population of Massive Young Stars in the Cluster Westerlund 1 A Rich Population of Massive Young Stars in the Cluster Westerlund 1

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004cxo..prop.1643s&link_type=abstract

Chandra Proposal ID #06200332

Computer Science

Chandra Proposal Id #06200332

Scientific paper

The compact heavily-reddened cluster Westerlund 1 in the southern Milky Way is spectacularly revealed in near-infrared images. The cluster is very young (age 3 - 8 My) and is dominated by a diverse population of high-mass stars that are undergoing rapid mass-loss and have already evolved off the main sequence. These include red and blue supergiants, a luminous blue variable candidate, and 11 recently-discovered Wolf-Rayet (WR) stars. In addition, nonthermal radio emission indicative of high-energy processes is present. We propose to obtain a sensitive Chandra ACIS observation of Westerlund 1 to identify X-ray emitting cluster members, test the validity of wind-shock theories of X-ray emission in massive stars, and search for diffuse X-rays from hot gas in the cluster wind.

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