含嵌入黑洞的旋转稠密恒星系统的动力学演化
Dynamical evolution of rotating dense stellar systems with embedded black holes
摘要：
研究了具有嵌入黑洞的自引力旋转稠密恒星系统（如球状星团、星系核）的演化。讨论了微分旋转扁平系统中黑洞与恒星分量的相互作用。利用2D+1 Fokker-Planck数值方法研究了弛豫引起的速度扩散与黑洞星吸积以及星系团旋转之间的相互作用。该模型可以再现黑洞影响区内的Bahcall-Wolf解$f \propto E^{1/4}$（$n \propto r^{-7/4}$）。重力陀螺和重力热不稳定性有助于系统的更快的演变，导致更短的崩溃时间相对于非旋转系统。角动量输运和恒星吸积支持弛豫时间尺度中心旋转的发展。我们探讨系统溶解由于质量损失的存在下的外部潮汐场（例如，球状星团在星系）。
英文摘要：
Evolution of self-gravitating rotating dense stellar systems (e.g. globular clusters, galactic nuclei) with embedded black holes is investigated. The interaction between the black hole and stellar component in differential rotating flattened systems is followed. The interplay between velocity diffusion due to relaxation and black hole star accretion is investigated together with cluster rotation using 2D+1 Fokker-Planck numerical methods. The models can reproduce the Bahcall-Wolf solution $f \propto E^{1/4}$ ($n \propto r^{-7/4}$) inside the zone of influence of the black hole. Gravo-gyro and gravothermal instabilities conduce the system to a faster evolution leading to shorter collapse times with respect to the non-rotating systems. Angular momentum transport and star accretion support the development of central rotation in relaxation time scales. We explore system dissolution due to mass-loss in the presence of an external tidal field (e.g. globular clusters in galaxies).
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