Study of Beta Lyrae spectra - Characteristics of the SiII 6347, 6371 doublet and the discovery of the cyclic variability of equivalent widths of lines of the loser's 'magnetized' atmosphere

Details Study of Beta Lyrae spectra - Characteristics of the SiII 6347, 6371 doublet and the discovery of the cyclic variability of equivalent widths of lines of the loser's 'magnetized' atmosphere Study of Beta Lyrae spectra - Characteristics of the SiII 6347, 6371 doublet and the discovery of the cyclic variability of equivalent widths of lines of the loser's 'magnetized' atmosphere

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993astl...19...19s&link_type=abstract

Astronomy Letters, Vol. 19, p. 19-25; Pis'ma v Astronomicheskii Zhurnal (ISSN 0320-0108), vol. 19, no. 1, p. 45-60. In Russian.

Astronomy and Astrophysics

Astronomy

2

Binary Stars, Line Spectra, Spectral Line Width, Stellar Atmospheres, Stellar Magnetic Fields, Stellar Mass Ejection, Stellar Spectra, Stellar Spectrophotometry, Absorption Spectra, Emission Spectra, Stellar Gravitation

Scientific paper

The study examines the variability with phase of the orbital period of the equivalent widths and other characteristics of absorption lines and the emission from the component profile of the SiII 6347, 6371 doublet. The general motion of W(lambda) = f(P) dependences for the loser's absorption lines is shaped by orbital modulation, which reflects the structure of the circumstellar gas in this close binary system. The equivalent widths of SiII emissions, as well as those of the loser's absorptions, follow the structure of the loser's magnetic field. The discovery of a new phenomenon - cyclic variability of the W(lambda) of the loser's lines during the orbital period - is reported. The structure of W(lambda) = f(P) dependences is modulated by the superposition of magnetic and gravitational fields.

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