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Clark, J. S. and Negueruela, I.
(2002).
DOI: https://doi.org/10.1051/0004-6361:20021623
Abstract
We report the discovery of a hitherto undetected population of Wolf-Rayet stars in the young galactic open cluster Westerlund 1. Optical spectroscopy of the cluster identified 11 such objects; provisional classification suggests that 6 are nitrogen rich (WN) and 5 carbon rich (WC). Including the previously identified Blue, Yellow & Red Super- & Hypergiants, Westerlund 1 clearly has a very rich population of massive post-Main Sequence objects. To date, the post-MS population of Westerlund 1 is significantly larger than that of any other galactic young open cluster - with the possible exception of the Arches - implying that it is potentially amongst the most massive young clusters yet identified in the Local Group.
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About
- Item ORO ID
- 13312
- Item Type
- Journal Item
- ISSN
- 1432-0746
- Keywords
- stellar evolution; Wolf Rayet; galaxies; starburst galaxies
- Academic Unit or School
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Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM) - Copyright Holders
- © 2002 ESO
- Depositing User
- Astrid Peterkin