DYNAMICAL EVOLUTION OF ROTATING SINGLE-MASS STELLAR CLUSTER
DYNAMICAL EVOLUTION OF ROTATING SINGLE-MASS STELLAR CLUSTER
复制标题
旋转单质量星团的动力学演化
DOI：
10.5303/jkas.2005.38.2.207
复制
发表时间：
2005
影响因子：
1
通讯作者：
S. Mineshige
中科院分区：
文献类型：
--
作者：
E. Ardi;R. Spurzem;S. Mineshige
利用N体模拟方法研究了自转对碰撞单质量星团动力学演化的影响。采用无量纲中心势参数和旋转参数表征的旋转King模型作为初始模型。我们的研究结果表明，内壳缓慢收缩，直到核心崩溃阶段达到，其次是一个缓慢的扩张。角动量被向外输送，而核心的旋转速度比以前更快，正如重力梯度突变理论所预测的那样。我们证实了自转在加速星团动力学演化，特别是加速核心坍缩过程中起着重要作用。
We study the influence of rotation on the dynamical evolution of collisional single-mass stellar clusters up to core-collapse by using N-body simulations. Rotating King models which are characterized by dimensionless central potential parameter and the rotation parameter are used as initial models. Our results show that inner shells slowly contract until core-collapse phase is reached, followed by a slow expansion. Angular momentum is transported outward, while the core is rotating even faster than before, as predicted by gravogyro catastrophe theory. We confirm that rotation plays an important role in accelerating the dynamical evolution of stellar cluster, in particular in accelerating the core collapse.