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arXiv 1407.4169astro-ph.SRastro-ph.GA
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星团蒙特卡罗模拟中真实潮汐场的处理

Treatment of realistic tidal field in Monte Carlo simulations of star clusters

A. Sollima, A. Mastrobuono Battisti

摘要:

我们提出了一种新的实现的Monte Carlo方法来模拟星团的演化。相对于以前开发的代码的主要改进是外部潮汐场的治疗,同时考虑到从集群边界和磁盘/隆起冲击的恒星的损失。我们提供的食谱处理偏心轨道在复杂的星系潜力。第一次计算包含21000和42000等质量粒子的恒星系统显示出良好的协议与直接N体模拟的演化方面的封闭质量和拉格朗日半径提供的质量损失率不超过临界值。

英文摘要:

We present a new implementation of the Monte Carlo method to simulate the evolution of star clusters. The major improvement with respect to the previously developed codes is the treatment of the external tidal field taking into account for both the loss of stars from the cluster boundary and the disk/bulge shocks. We provide recipes to handle with eccentric orbits in complex galactic potentials. The first calculations for stellar systems containing 21000 and 42000 equal-mass particles show good agreement with direct N-body simulations in terms of the evolution of both the enclosed mass and the Lagrangian radii provided that the mass-loss rate does not exceed a critical value.

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