The ultraviolet spectrum of Beta Lyrae

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Eclipsing Binary Stars, Satellite Observation, Stellar Spectra, Ultraviolet Spectra, Iue, Line Spectra, Tables (Data)

Scientific paper

The high-resolution UV spectrum of Beta Lyrae observed with the IUE satellite between 1980 and 1986 is analyzed. A complete list of line identifications for the entire spectral range of the IUE (1225-3125 A) is presented. The main spectral features are P Cygni profiles of resonance lines of high ionization states typical of stellar winds, some of which are combined with a broad emission feature due probably to an accretion disk; P Cygni profiles due to moderately ionized atoms in the iron group (mostly Fe III and Ni III); and absorption lines of elements in lower ionization stages, such as S II, Si II (higher multiplets), Ni II, and a large number of Fe II lines.

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