Gravothermal oscillations after core collapse in globular cluster evolution
Gravothermal oscillations after core collapse in globular cluster evolution
复制标题
球状星团演化中核心塌陷后的重力热振荡
DOI：
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发表时间：
1989
期刊：
影响因子：
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通讯作者：
M. Wise
中科院分区：
文献类型：
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作者：
H. Cohn;P. Hut;M. Wise
球状星团的演化是在一个详细的福克-普朗克计算建模，并遵循远远超出核心崩溃。该模型包括对集群的热效应所造成的动态形成和演化的双星，捕获在三体相遇和硬化的相互作用与通过恒星。正如预期的那样，双星产生的能量在足够高的中心密度下逆转了核心坍缩，并驱动了核心的再膨胀。Sugimoto和Bettwieser（1983）先前的发现表明，这种膨胀对于中心密度和核心半径的大振幅振荡的发展是不稳定的。球状星团的长期演化的结果的影响，进行了讨论。参考文献42篇。
The evolution of globular clusters is modeled in a detailed Fokker-Planck calculation and is followed well beyond core collapse. The model includes the heating effects on the cluster caused by the dynamical formation and evolution of binaries, captured in three-body encounters and hardened by interactions with passing stars. As expected, energy generation by binaries reverses core collapse at sufficiently high central densities and drives a reexpansion of the core. The previous findings of Sugimoto and Bettwieser (1983) that this expansion is unstable to the development of large-amplitude oscillations in the central density and core radius. The implications of the results for the long-term evolution of globular clusters, are discussed. 42 refs.