Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...183.5207b&link_type=abstract
American Astronomical Society, 183rd AAS Meeting, #52.07; Bulletin of the American Astronomical Society, Vol. 25, p.1373
Astronomy and Astrophysics
Astronomy
Scientific paper
SMC X-1 represents a subclass of high-mass X-ray binaries with high X-ray luminosity. In these X-ray luminous systems the X-ray flux is sufficiently intense that any circumstellar gas exposed to the X-ray source is highly ionized. The result of this X-ray photo-ionization is a supression of the radiatively-driven wind that would normally be associated with an early-type star like the primary in SMC X-1. However, the stellar wind is not supressed from the shadowed side of the primary, and this shadow wind can contribute a substantial amount of circumstellar gas to the system. We will present 3D time-dependent hydrodynamic simulations of the SMC X-1 system illustrating the presence of this shadow wind. This simulation also illustrates the Bjorkman-Cassinelli effect of focussing a radiatively-driven wind into the plane of the equator when the star is rapidly rotating, as implied if the primary star in SMC X-1 is in synchronous rotation with the binary orbit.
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