UV photometric and line-width variability of LMC-4

Details UV photometric and line-width variability of LMC-4 UV photometric and line-width variability of LMC-4

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982esasp.176..259v&link_type=abstract

In ESA 3rd European IUE Conf. p 259-260 (SEE N83-11889 02-88)

Computer Science

Binary Stars, Resonance Lines, Spectral Line Width, Variability, X Ray Sources, Ionization Potentials, Iue, Light Curve

Scientific paper

Low resolution IUE spectra of the massive X-ray binary LMC X-4 were obtained between 1200 and 3200 A. Comparison of these observations with theoretical light curves for an X-ray heated tidally distorted star indicate the existence of a disk around the compact star. The resonance 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.

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