Long-Term Spectrophotometric Behaviour of B[e] Stars
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Classic Be stars show characteristic linear relations between luminosity excess and intrinsic reddening in the visible range against the total Balmer discontinuity (BD) (6). These relations differ according to whether the star is in a “Be“ or a “Be-shell“ phase, so that the limit between the two spec-trophotometric behaviours (SPB) may be used to infer a rough spectral type of the underlying star. As circumstellar dust absorption cannot strongly affect BD determination, it is worth trying to identify some kind of a break between Be-like and Be-shell-like behaviour in B[e] stars produced by the gaseous circumstellar envelope, for their spectral type is difficult to estimate otherwise.
KeywordsOptical Depth Spectral Type Dust Absorption Continuum Emission Band Versus
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- Moujtahid, A., Zorec, J. Hubert, A.M. et al. (1997), A&AS (in press)Google Scholar