检测黑洞双星的自转

Detett the black hole spin in binaries

基于旋转黑洞能量提取的两种机制,Blandford-Znajek(BZ)和magnetic coupling(MC)的共存模型,提出计算黑洞自转的一种新方法.利用该方法计算了既有射电喷流又有高频准周期振荡的黑洞双星的自转,发现其中心是一个与吸积盘旋转方向相同的快转黑洞,且黑洞自转范围很窄.该方法得到的计算结果与其他方法得到的结果很接近.

A new approach of detecting the black hole spins in binaries was proposed based on the coexistence of two mechanisms of extracting energy from the rotating black hole： Blandford- Znajek（BZ） and magnetic coupling（MC）. We derived the black hole spin of several binaries which both the QPO and jet were observed. It was shown that the sources contain a fast - spinning black hole in the same direction as the accretion disk. And the spins were constrained in rather narrow range. The results presented in this paper were in good agreement with others.