Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...106..339v&link_type=abstract
Astronomy and Astrophysics, vol. 106, no. 2, Feb. 1982, p. 339-344. Research supported by the Nederlandse Organisatie voor Zuiv
Astronomy and Astrophysics
Astrophysics
25
Binary Stars, Light Curve, Spectral Energy Distribution, Spectral Resolution, Ultraviolet Spectroscopy, X Ray Binaries, X Ray Sources, Atmospheric Ionization, Iue, Resonance Lines, Stellar Atmospheres, Stellar Mass, Stellar Spectra, Stellar Spectrophotometry, Stellar Structure, Stellar Temperature, Ultraviolet Spectra
Scientific paper
Low-resolution IUE spectra of the massive X-ray binaries LMC X-4 and SMC X-1 have been obtained between 1200 and 3200 A at several epochs in August 1979 and April 1980. Comparison of these observations with theoretical light curves for an X-ray heated tidally distorted star indicates the existence of a disk around the compact star. The resonance-line doublets of N V, C IV and Si IV show marked changes with orbital phase, being particularly weak when the X-ray source is in front of the primary. These changes can be understood in terms of an anisotropic ionization structure in the expanding atmosphere of the primary caused by the presence of the X-ray source companion.
Bonnet-Bidaud Jean-Marc
Chevalier Clément
Glencross William M.
Hammerschlag-Hensberge Godelieve
Ilovaisky Sergio A.
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