Spectral variability in early-type binary X-ray systems

Details Spectral variability in early-type binary X-ray systems Spectral variability in early-type binary X-ray systems

Jan 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984stin...8419195m&link_type=abstract

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Computer Science

Ionization, Stellar Winds, X Ray Sources, Resonance Lines, Ultraviolet Spectra, X Ray Spectra

Scientific paper

Theoretical models for the ionization of trace elements in a strong stellar wind by a compact binary X-ray source and for the resulting orbital phase dependence of the emergent soft X-ray spectra and the profiles of ultraviolet resonance lines are presented. Model results agree qualitatively with the X-ray and ultraviolet spectra of the system 4U 0900-40/HD 77581 and explain the suppression of the absorption profiles of the Si IV upsilon 1394 and C IV upsilon 1548 lines when the X-ray sources is in front of the star. The model predicts that the absorption profiles of the N V upsilon 1239 and O VI upsilon 1032 lines will be enhanced rather than suppressed during this orbital phase. We predict phase-dependent linear polarization in the resonance lines profiles. Future observations of these phase dependent effects in early-type binary X-ray systems may be used to investigate the dynamics of stellar winds and their interactions with the X-ray source.

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