Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apjs...62..875m&link_type=abstract
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 62, Dec. 1986, p. 875-897. NSERC-supported research.
Astronomy and Astrophysics
Astronomy
20
B Stars, Gas Ionization, Stellar Spectra, Ultraviolet Astronomy, Balmer Series, Data Reduction, H Alpha Line, Iue, Spectral Line Width
Scientific paper
The results of an investigation of the dependence of the strength/presence of lines from superionized species (N V, C IV, Si IV) on spectral type and v sin i in the ultraviolet spectra of Be stars are presented. No evidence is found for N V in stars later than B2; this apparent absence may, however, simply reflect problems with the IUE reduction procedure. The C IV and Si IV lines pervade the ultraviolet spectra of all B subtypes, with a trend toward increasing strength with increasing effective temperature. A similar trend in the 'edge velocity' of the feature with spectral type is found. The data also suggest a possible trend toward the presence of stronger C IV and a higher edge velocity in stars with larger values of v sin i. The observed temporal variability in N V, C IV, and Si IV in some Be stars is discussed.
Marlborough J. M.
Peters Geraldine Joan
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