AAS Meeting #194 - Chicago, Illinois, May/June 1999
Session 13. Atmospheres, Winds, Envelopes, Disks and Planetaries
Display, Monday, May 31, 1999, 9:20am-6:30pm, Southeast Exhibit Hall

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[13.07] B-type emission-line stars with compact dusty envelopes

A.S. Miroshnichenko (Pulkovo Observatory), P. Corporon (University of Montreal), T.A. Shejkina (Fesenkov Astrophysical Institute)

Among IRAS sources associated with early-type emission-line stars there is a small group of objects with rather large IR excesses and a steep decrease of the IR flux longward of 25 microns. This probably implies that these objects are surrounded by compact dusty formations. Most of them (such as HD 45677, HD 50138, RY Sct, MWC 84, MWC 342) have been classified as B[e] stars. Hypotheses about nature and evolutionary state of such objects are still rather controversial. We complete the group with several recently selected stars and present a study of observational characteristics of all its members including our new multicolor photometric data, high-resolution optical spectroscopy and IRAS maps. Main physical parameters of the group objects are estimated and their possible evolutionary state is discussed.

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