Ultraviolet high-resolution spectroscopy of the X-ray binary SK 160/SMC X-1

Details Ultraviolet high-resolution spectroscopy of the X-ray binary SK 160/SMC X-1 Ultraviolet high-resolution spectroscopy of the X-ray binary SK 160/SMC X-1

Aug 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...283..249h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 283, Aug. 1, 1984, p. 249-253. Research supported by the Nederlandse Organi

Astronomy and Astrophysics

Astrophysics

18

Eclipsing Binary Stars, Magellanic Clouds, Stellar Winds, Ultraviolet Spectra, X Ray Sources, Iue, Orbital Elements, Photoionization, Radial Velocity, Red Shift, Resonance Lines

Scientific paper

High-resolution IUE spectra of Sk 160, the optical counterpart of the X-ray source SMC X-1, show substantial variations with orbital phase of the resonance P Cygni profiles. These variations are ascribed to the changing ionization state in the stellar wind caused by the X-rays emitted by the companion, as suggested by Hatchett and McCray and first established for the galactic X-ray binary Vela X-1. Furthermore, the profile observed during X-ray eclipse differs significantly from profiles of similar stars in the absence of X-ray ionization.

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