Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989ap%26ss.161...61h&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 161, no. 1, Nov. 1989, p. 61-73.
Astronomy and Astrophysics
Astrophysics
30
B Stars, Emission Spectra, Spectral Line Width, Stellar Spectra, Visible Spectrum, Absorption Spectra, Balmer Series, H Alpha Line, Photosphere, Stellar Envelopes, Stellar Rotation
Scientific paper
Using a sample of photoelectric measurements of Balmer and Fe II emission lines of the 115 brightest Be stars, the following emission line width parameters have been investigated: full width at half maximum, total width at the base, and double-peak separation. It is found that the basic origin of emission-line broadening in Be stars is kinematical and rotational; the correlations with v sin i are best for weaker emission lines while H-alpha shows considerable scatter. Total width at the base is uncorrelated with v sin i except for the Fe II lines. Peak separation is found to be a function both of v sin i and of equivalent width due to the fact, that within Huang's disk model, normalized peak separation to v sin i is governed by the outer envelope radius.
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