Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...189..147h&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 189, no. 1-2, Jan. 1988, p. 147-162.
Astronomy and Astrophysics
Astrophysics
80
Beryllium, Emission Spectra, High Resolution, Line Spectra, Stellar Envelopes, Variable Stars, Balmer Series, Signal To Noise Ratios, Spectrum Analysis, Stellar Spectra
Scientific paper
Results of high resolution (R = 100,000) high signal-to-noise Balmer emission-line spectroscopy are presented for a sample of 26 Be stars. In addition of H-alpha line profiles for most of these stars, H-beta line and H-gamma line profiles were obtained for 16 and 15 stars, respectively. It was found that all the H-alpha line profiles can be classified using a simple scheme: double-peak (class 1) and single-peak (class 2) profiles, with two additional subclasses (the shell-like and binarylike profiles). Sixty nine percent of the star profiles studied were found to belong to class 1. For 79 percent of these stars, a two-component structure, defined by inflections in the flanks of the emission line profile, was found. Most of the stars showed correlations between their line width parameters and the stellar projected rotational velocity, confirming the disklike geometry of Be star envelopes.
Hanuschik Reinhard W.
Kaiser David
Kozok J. R.
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