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A magnetic model for low/hard state of black hole binaries

Yong-Chun Ye  Ding-Xiong Wang  Chang-Yin Huang  Xiao-Feng Cao  
【摘要】:A magnetic model for the low/hard state(LHS) of two black hole X-ray binaries(BHXBs),H1743–322 and GX 339–4, is proposed based on transport of the magnetic field from a companion into an accretion disk around a black hole(BH). This model consists of a truncated thin disk with an inner advection-dominated accretion flow(ADAF). The spectral profiles of the sources are fitted in agreement with the data observed at four different dates corresponding to the rising phase of the LHS. In addition,the association of the LHS with a quasi-steady jet is modeled based on transport of magnetic field, where the Blandford-Znajek(BZ) and Blandford-Payne(BP) processes are invoked to drive the jets from BH and inner ADAF. It turns out that the steep radio/X-ray correlations observed in H1743–322 and GX 339–4 can be interpreted based on our model.

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