B-type emission-line stars with compact dusty envelopes

Details B-type emission-line stars with compact dusty envelopes B-type emission-line stars with compact dusty envelopes

May 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...194.1307m&link_type=abstract

American Astronomical Society, 194th AAS Meeting, #13.07; Bulletin of the American Astronomical Society, Vol. 31, p.845

Astronomy and Astrophysics

Astronomy

3

Scientific paper

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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