A disk-corona model for the low/hard state of black hole X-ray binaries  

作　　者：Jiu-Zhou Wang Ding-Xiong Wang Chang-Yin Huang 

机构地区：[1]School of Physics, Huazhong University of Science and Technology

出　　处：《Research in Astronomy and Astrophysics》2013年第10期1163-1180,共18页天文和天体物理学研究（英文版）

基　　金：Supported by the National Natural Science Foundation of China (No. 11173011);the National Basic Research Program of China (973 Program, No. 2009CB824800)

摘　　要：A disk-corona model for fitting the low/hard（LH）state of the associated steady jet in black hole X-ray binaries（BHXBs）is proposed based on the large-scale magnetic field configuration that arises from the coexistence of the Blandford-Znajek（BZ）and Blandford-Payne（BP）processes,where the magnetic field configuration for the BP process is determined by the requirement of energy conversion from Poynting energy flux into kinetic energy flux in the jet.It is found that corona current is crucial to guarantee the consistency of the jet launching from the accretion disk.The relative importance of the BZ and BP processes in powering jets from black hole accretion disks is discussed,and the LH state of several BHXBs is fitted based on our model.In addition,we suggest that magnetic field configuration can be regarded as the second parameter for governing the state transition of BHXBs.A disk-corona model for fitting the low/hard（LH）state of the associated steady jet in black hole X-ray binaries（BHXBs）is proposed based on the large-scale magnetic field configuration that arises from the coexistence of the Blandford-Znajek（BZ）and Blandford-Payne（BP）processes,where the magnetic field configuration for the BP process is determined by the requirement of energy conversion from Poynting energy flux into kinetic energy flux in the jet.It is found that corona current is crucial to guarantee the consistency of the jet launching from the accretion disk.The relative importance of the BZ and BP processes in powering jets from black hole accretion disks is discussed,and the LH state of several BHXBs is fitted based on our model.In addition,we suggest that magnetic field configuration can be regarded as the second parameter for governing the state transition of BHXBs.

关 键 词：ACCRETION accretion disks black hole physics magnetic field jet power 

分 类 号：P145.8[天文地球—天体物理] TQ226.61[天文地球—天文学]