星团的蒙特卡罗模拟- IV。疏散星团M67的蒙特卡罗程序校准及其与观测的比较
Monte Carlo Simulations of Star Clusters - IV. Calibration of the Monte Carlo Code and Comparison with Observations for the Open Cluster M67
摘要：
我们概述了所需的步骤，以便将单星和双星的演化到一个特定的蒙特卡罗代码的星团的动态演化。我们校准的结果对N体模拟，并提出了旧的疏散星团M67（已在文献中进行了深入研究与N体技术）的演变模型。通过选择适当的自由码参数来完成校准。我们特别描述的演变的二进制，白矮星和蓝离散人口，虽然不是所有的渠道，蓝离散形成的代表，但在我们的模拟。校准的Monte Carlo运行显示出良好的协议与N体模拟的结果不仅为全球集群参数，但也为例如二进制分数，光度函数和表面亮度。M67的蒙特卡罗模拟与观测数据的比较表明，它们之间有可能得到相当好的一致性。然而，由于数值数据的统计起伏和观测数据的不确定性，对星系团初始条件的推断并不可靠。
英文摘要：
We outline the steps needed in order to incorporate the evolution of single and binary stars into a particular Monte Carlo code for the dynamical evolution of a star cluster. We calibrate the results against N-body simulations, and present models for the evolution of the old open cluster M67 (which has been studied thoroughly in the literature with N-body techniques). The calibration is done by choosing appropriate free code parameters. We describe in particular the evolution of the binary, white dwarf and blue straggler populations, though not all channels for blue straggler formation are represented yet in our simulations. Calibrated Monte Carlo runs show good agreement with results of N-body simulations not only for global cluster parameters, but also for e.g. binary fraction, luminosity function and surface brightness. Comparison of Monte Carlo simulations with observational data for M67 shows that is possible to get reasonably good agreement between them. Unfortunately, because of the large statistical fluctuations of the numerical data and uncertainties in the observational data the inferred conclusions about the cluster initial conditions are not firm.
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