Clark, J. S. and Negueruela, I.
(2004).
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| DOI (Digital Object Identifier) Link: | http://doi.org/10.1051/0004-6361:20031700 |
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| Google Scholar: | Look up in Google Scholar |
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.
| Item Type: | Journal Article |
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| Copyright Holders: | 2004 ESO |
| ISSN: | 1432-0746 |
| Keywords: | stellar evolution; variable stars; stellar winds, outflows; supergiants |
| Academic Unit/Department: | Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences Faculty of Science, Technology, Engineering and Mathematics (STEM) |
| Interdisciplinary Research Centre: | Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR) |
| Item ID: | 13112 |
| Depositing User: | Astrid Peterkin |
| Date Deposited: | 12 Feb 2009 17:01 |
| Last Modified: | 02 Aug 2016 19:29 |
| URI: | http://oro.open.ac.uk/id/eprint/13112 |
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