Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976mmsai..47..453v&link_type=abstract
Società Astronomica Italiana, Memorie, vol. 47, Sept. 1976, p. 453-492.
Astronomy and Astrophysics
Astronomy
1
Binary Stars, Stellar Mass Accretion, Ultraviolet Astronomy, X Ray Binaries, X Ray Sources, X Ray Stars, Angular Momentum, Black Holes (Astronomy), Companion Stars, Emission Spectra, Gas Ionization, Light Curve, Stellar Winds, White Dwarf Stars, X Ray Irradiation
Scientific paper
Ultraviolet observations of X-ray binary stars are used in formulating descriptions of the accretion processes occuring in the systems and the X-ray heating of the outer layers of the companion stars. Proposed mechanisms accounting for the X-ray emission of binary systems, which make reference to the capture of accreted matter from the stellar wind of a massive early-type companion star, are reviewed; P-Cygni-type profiles of resonance lines in the far UV, which yield information on the stellar winds, are also considered. Factors affecting the UV behavior of X-ray binaries, including the ionization structure and emissivity of gases heated by the X-ray source, are examined.
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