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The Be Phenomenon: Connections to B-supergiants

Published online by Cambridge University Press:  12 April 2016


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

Abstract

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
Copyright
Copyright © Astronomical Society of the Pacific 2000

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