Other
Scientific paper
Apr 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982iaus...98..135a&link_type=abstract
In: Be stars; Proceedings of the Symposium, Munich, West Germany, April 6-10, 1981. (A83-10301 01-90) Dordrecht, D. Reidel Publi
Other
B Stars, H Alpha Line, Stellar Spectra, Variable Stars, Astronomical Catalogs, Spectral Line Width
Scientific paper
A homogeneous H-alpha profile has been obtained, using linear response receivers, sensitive enough to show variations on the order of a few minutes. Observations were made with the 152 cm telescope at the Haute-Provence Observatory, (France), and approximately 100 profiles of 70 Be stars were obtained. In comparing these results with others, it is found that an absorption exists at the center of the H-alpha line for such stars as 25 Peg, 66 Oph, and 120 Tau. In addition, structural variations were discovered in 20 Be stars: for X Per a strong April emission reveals two inflections on the violet wing, while in December only one of these inflections is evident; HD 41335 observations show that the strong April emission becomes, in December, a simple emission with two inflections on the violet wing; and for Kappa Dra, an approximate 50 km/sec line shift occurs within a 24 hour interval. Finally, in studying H-alpha line widths, it is shown that one or more Gaussian type functions are present, and the width of the pure emission line is determined.
Andrillat Yvette
Fehrenbach Ch.
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