Logarithmic color maps of the fraction μ of stellar wind captured by the accretor as a function of the stellar filling factor and of the ratio of the terminal wind speed by the orbital speed. Left panel: (resp. right) column is for β = 1 (resp. β=2). Upper panel: (resp. lower) row stands for a mass ratio of 2 (resp. 15) typical of a BH (resp. a NS) accreting from a supergiant companion. From white to black, the fraction of stellar material captured varies by more than two orders of magnitude, with the configurations in green (and white) being more susceptible to giving large X-ray luminosities than the regions in red (and black).
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