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Clark, J. S. and Negueruela, I.
(2004).
DOI: https://doi.org/10.1051/0004-6361:20031700
Abstract
We present observations of the massive transitional star W243 in Westerlund 1 . We find an apparent spectral type of early-mid A from our data, in contrast to an earlier classification of B2I, made from data obtained in 1981. The concurrent development of a rich emission line spectrum suggests a very high mass loss rate; the continued presence of He I emission suggesting that the underlying star remains significantly hotter than implied by its apparent spectral type. We suggest that W243 is a Luminous Blue Variable undergoing an eruptive phase, leading to an extreme mass loss rate and the formation of a pseudo photosphere.
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About
- Item ORO ID
- 13112
- Item Type
- Journal Item
- ISSN
- 1432-0746
- Keywords
- stellar evolution; variable stars; stellar winds, outflows; supergiants
- Academic Unit or School
-
Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM) - Copyright Holders
- © 2004 ESO
- Depositing User
- Astrid Peterkin