Clark, J. S. and Negueruela, I.
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|DOI (Digital Object Identifier) Link:||http://doi.org/10.1051/0004-6361:20031700|
|Google Scholar:||Look up in Google Scholar|
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|
|Copyright Holders:||2004 ESO|
|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)|
|Depositing User:||Astrid Peterkin|
|Date Deposited:||12 Feb 2009 17:01|
|Last Modified:||04 Oct 2016 15:18|
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