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

• Published in: Research in astronomy and astrophysics Vol. 13; no. 10; pp. 1163 - 1180
• Main Authors: Wang, Jiu-Zhou, Wang, Ding-Xiong, Huang, Chang-Yin
• Format: Journal Article
• Language: English
• Published: 01.10.2013
• Subjects: Accretion disks; Binary stars; Black holes (astronomy); Consistency; Direct power generation; Flux; Magnetic field configurations; X-ray stars; X射线双星; 模型拟合; 电晕电流; 磁场结构; 磁盘; 能量转换; 能量通量; 黑洞
• ISSN: 1674-4527; 2397-6209
• DOI: 10.1088/1674-4527/13/10/003

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.