Abstract
A Be star has a two-component extended atmosphere, a polar region and a cool disc-like region. The polar region consists of a low-density, fast outflow emitting UV radiation. In contrast to the polar region, the disc region onsists of a high-density plasma with low outflow velocity. The optical emission lines and the IR excess arise from this region. The nature of this region is not well understood, despite that large observational efforts have een devoted to the study of Be stars. The purpose of this paper is to study the disc structure of Be stars, based on the viscous decretion disc scenario, in which the matter ejected from the star drifts outward because of the effects of viscosity and forms a disc (Lee et al. 1991).
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References
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© 1998 Springer Science+Business Media Dordrecht
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Okazaki, A.T. (1998). Transonic Decretion Discs Around Be Stars. In: Dyson, J., et al. Astrophysics and Space Science. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5076-7_22
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DOI: https://doi.org/10.1007/978-94-011-5076-7_22
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-6132-2
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