X-Ray Emission From Colliding Wind Binaries

Details X-Ray Emission From Colliding Wind Binaries X-Ray Emission From Colliding Wind Binaries

Dec 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996rmxac...5...54c&link_type=abstract

Workshop on Colliding Winds in Binary Stars to Honor Jorge Sahade, vol. 5, p. 54

Physics

29

X Rays, Emission, O Stars, Binary Stars, Wind (Meteorology), Stellar Spectra, Variability, Cygnus Constellation, Binary Data

Scientific paper

I present new evidence of X-ray production by wind collisions in early-type binary systems by looking for phase-dependent changes in the observed X-ray emission. Newly derived X-ray lightcurves for 18 O-type binaries indicate that variability is far more common for O-type binaries than for single O stars. Four of the 18 systems studied show clear evidence of phase-dependent variability, suggesting that a large fraction of the X-ray emission is produced in a localized wind collision region. I examine 3 important WR + O systems, WR140, gamma2 Velorum and V444 Cygni, and show that the observed X-ray variations are consistent with the predictions of modern colliding wind models.

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