FeII emission lines in Be stars

Details FeII emission lines in Be stars FeII emission lines in Be stars

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sf2a.conf..277a&link_type=abstract

SF2A-2004: Semaine de l'Astrophysique Francaise, meeting held in Paris, France, June 14-18, 2004. Edited by F. Combes, D. Barret

Astronomy and Astrophysics

Astrophysics

Scientific paper

FeII emission lines in spectra of early Be stars have FWHM fairly large, which reveal that these lines are formed in regions of the circumstellar envelope which are not far from the central star. Some FeII emission line profiles have a peculiar shape called steeple-like. Current interpretations of this line shapes evoke eccentric or ellipsoidal circumstellar envelopes. We show in this paper that steeple-like profiles can be formed by rotating and expanding circular gaseous rings probably produced by discrete mass ejections of the star.

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