活动星系核中心黑洞热力学量的演化  

THE EVOLUTION OF THERMODYNAMICAL QUANTITIES OF THE CENTRAL BLACK HOLES IN ACTIVE GALACTIC NUCLEI

作　　者：陆由俊[1] 周又元[1] 

机构地区：[1]中国科学技术大学天体物理中心,合肥230026

出　　处：《天文学报》1998年第1期20-27,共8页Acta Astronomica Sinica

摘　　要：本文考虑吸积和Blandford－Znajek过程的影响，活动星系核中心黑洞的无量纲化角动量最终要演化至一稳定值，也就是说中心黑洞不会演化至极端Kerr黑洞，即不会打破热力学第三定律．这一演化过程对厚、薄两种不同几何结构的盘是相似的，即从性质上说其不依赖于盘结构．无量纲化角动量最终稳定值的大小由BZ过程的强度和吸积盘的几何结构确定．Due to the effects of accretion and Blandford-Znajek process, the central blackholes in active galactic nuclei evolve with bine and the dimensionless angularmomentum gets spin up to a stable value. Thus the cental hole will not become anextreme Kerr black hole, and the third law of thermodynamics will not be violated.The existence of an equilibrium state of the hole is qualitahvely independent of thegeometry of the disk. The final stable value of the dimensionless angular momentumcan be determined by the intensity of the BZ process and disk geometry.

关 键 词：黑洞 吸积盘 BZ过程 活动星系核 热力学 角动星 

分 类 号：P145.8[天文地球—天体物理] P157.6[天文地球—天文学]