Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988baicz..39..265d&link_type=abstract
Astronomical Institutes of Czechoslovakia, Bulletin (ISSN 0004-6248), vol. 39, no. 5, 1988, p. 265-288.
Astronomy and Astrophysics
Astronomy
3
Eclipsing Binary Stars, Helium, Line Spectra, Stellar Atmospheres, Abundance, Electron Transitions, Spectral Line Width, Stellar Envelopes, Thermodynamic Equilibrium
Scientific paper
Further results of a non-LTE treatment of 24 He I lines based on a model atmosphere for Beta Lyr primary are presented. The run of the b-factors with depth in the stellar atmosphere is presented along with their dependence on the adopted helium abundance. A comparison is made between equivalent widths when a NLTE approach is employed versus the LTE approximation for some He I lines of general interest. Evidence supporting the possibility that certain resonance and shell lines originate in a circumstellar envelope with low density is presented.
Dimitrov Dimitar L.
Kubát Jiri
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