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The Be Phenomenon: Connections to B-supergiants

Published online by Cambridge University Press:  12 April 2016

Andreas Kaufer
Andreas Kaufer*
Affiliation:
European Southern Observatory, Alonso de Cordova 3107, Santiago 19, Chile

Abstract

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In this contribution the spectral characteristics, physical properties, and the evolutionary status of B-type supergiants is reviewed with respect to the Be phenomenon. Long-term monitoring campaigns in the UV and the optical have recently revealed the distinct variability patterns of the photospheric and the emission-line spectra of this class. The various proposed scenarios for the spatially structured circumstellar envelopes and their rotational modulation are presented. The possibility of generating and maintaining large-scale wind structures by photospheric processes which structure the underlying stellar surfaces is discussed. Some open questions in connection with these hypotheses will be identified.

Type
1. Overview
Information
International Astronomical Union Colloquium , Volume 175: The Be Phenomenon in Early-Type Stars , 2000 , pp. 37 - 47
Copyright
Copyright © Astronomical Society of the Pacific 2000

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