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STATISTICAL MECHANICS OF THE COSMOLOGICAL MANY-BODY PROBLEM

机译:宇宙人体问题的统计力学

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We derive analytical expressions for the grand canonical partition functions of point masses, and of extended masses (e.g., galaxies with halos), which cluster gravitationally in an expanding universe. From the partition functions, we obtain the system's thermodynamic properties, distribution functions (including voids and counts in cells), and moments of distributions such as their skewness and kurtosis. This also provides an analytical calculation of the evolution of the distribution. Our results apply to both linear and nonlinear regimes of clustering. In the limit of point masses, these results reduce exactly to previous results derived from thermodynamics, thus providing a new, more fundamental foundation for the earlier results.
机译:我们导出点质量和扩展质量(例如具有晕圈的星系)的大正则分配函数的解析表达式,它们在重力作用下聚集在一个扩展的宇宙中。从分区函数中,我们获得系统的热力学性质,分布函数(包括单元中的空隙和计数)以及分布的矩(例如偏度和峰度)。这也提供了分布演变的分析计算。我们的结果适用于线性和非线性聚类机制。在点质量的限制下,这些结果与从热力学得出的先前结果完全相反,从而为早期结果提供了新的,更基础的基础。

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