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Evolutionary diagnostics of LBV spectra and systems in the LMC

Published online by Cambridge University Press:  12 April 2016

Nolan R. Walborn
Nolan R. Walborn*
Affiliation:
Space Telescope Science Institute3700 San Martin Drive Baltimore, Maryland 21218, USA

Abstract

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The characteristics of the Ofpe/WN9 class in the LMC, including two newly discovered members, are reviewed; a strong relationship between this class and the LBVs is established by HDE 269858 = Radcliffe 127, currently in outburst with a spectrum identical to that of S Doradus. The evidence for CNO-cycle products, i.e., enhanced N and He, on the surfaces and in the circumstellar nebulae of Ofpe/WN9 objects and LBVs is discussed, with emphasis on recent near-IR observations of He/H. Finally, the occurrence of several Ofpe/WN9 and LBV stars in compact multiple systems will enable valuable information about the evolutionary status of the peculiar objects to be derived. Strong threads unite these three topics: the same objects frequently recur in each.

Type
Section I: Main Papers, General Discussions, and Two Panel Discussions
Information
International Astronomical Union Colloquium , Volume 113: Physics of Luminous Blue Variables , 1989 , pp. 27 - 34
Copyright
Copyright © Kluwer 1989

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