Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...240..169f&link_type=abstract
Astrophysical Journal, Part 1, vol. 240, Aug. 1980, p. 169-179.
Astronomy and Astrophysics
Astrophysics
14
Binary Stars, O Stars, Periodic Variations, Spectrum Analysis, Stellar Spectra, Stellar Spectrophotometry, X Ray Sources, Absorption Spectra, Iue, Line Spectra, Radial Velocity, Stellar Gravitation, Stellar Models, Stellar Winds, X Ray Spectra, X Ray Spectroscopy
Scientific paper
Spectroscopic observations of the Of star HD 153919, the primary in the 4U 1700-37 X-ray binary system are examined. The phase dependent absorption components in the H(alpha) and the He I gamma 5876 lines show the presence of a gas stream in the stellar wind of the primary; it is proposed that the gas stream originates at the inner Lagrangian point of the binary system. A geometrical model of the system is constructed which includes a region around the primary and the gas stream. A series of 27 successive spectra recorded in a 95 min time interval during a X-ray source eclipse is discussed; no evidence was found for rapid variations which indicates that the stellar wind is homogeneous over scales larger than 10 to the 10th cm.
Fahlman Gregory G.
Walker Gordon A. H.
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