The coupling of a disk corona and a jet for the radio/X-ray correlation in black hole X-ray binaries

摘要

We interpret the radio/X-ray correlation of L_R ∞ L_X~(~1.4) for L_X/L_(Edd) > 10~(-3) with a detailed disk corona-jet model, in which the accretion flow and the jet are connected by a parameter, η, describing the fraction of the matter in the accretion flow ejected outward to form the jet. We calculate L_R and L_x at different M, adjusting η to fit the observed radio/X-ray correlation of the black hole X-ray transient H1743-322 for L_X/L_(Edd) > 10~(-3). It is found that the value of η for this radio/X-ray correlation for L_X /L_(Edd) > 10~(-3), is systematically less than that of the case for L_X/L_(Edd) < 10-3, which is consistent with the general idea that the jet is often relatively suppressed at the high luminosity phase in black hole X-ray binaries.