黑洞附近吸积流的稳定性研究  

A STABILITY INVESTIGATION ON THE ACCRETION FLOW NEAR A BLACK HOLE

作　　者：曹新伍[1] 张家铝[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》1993年第4期366-373,共8页Acta Astronomica Sinica

基　　金：国家自然科学基金

摘　　要：本文采用了多方物态方程p=K_ρ^(1+1/R)研究了在黑洞附近跨声速α吸积盘的径向线性稳定性.在导出扰动色散关系时考虑了吸积流的径向运动速度.结果表明粘滞系数α存在一上限α_c,当α>α,时,吸积流是不稳定的.α_c与多方指数n及吸积流的径向速度v,有关.The radial linear stability of a transonic a-viscosity accretion disk around a black hole is investigated based on a polytropic equation of state p=K_ρ^(1+1/n). in this paper. The radial velocity of the accretion flow is considered in deriving the perturbed dispersion relation. The accretion flow becomes unstable when the viscosity parameter a is greater than a critical value α_c which is determined by the value of polytropic index n and the radial velocity of the flow.

关 键 词：吸积 吸积盘 黑洞 稳定性 

分 类 号：P145.8[天文地球—天体物理]