标题： 非线性宇宙结构形成 显示英文标题

标题： Nonlinear Cosmological Structure Formation

摘要： 我综述了密度涨落的线性与非线性功率谱的演化及其对模型的依赖性。 回顾了冷暗物质（CDM）和冷+热暗物质（C+HDM）宇宙学模型中的线性功率谱的特征，并总结了一些有用的解析近似。 然后用宇宙数值模拟的结果来说明非线性引力聚团化的过程，并计算非线性功率谱。 给出了适用于C+HDM模型的一个解析近似，用于联系线性与非线性功率谱。 显示英文摘要

摘要： I present a general discussion of the evolution and model-dependence of both the linear and nonlinear power spectrum of density fluctuations. The features of the linear power spectrum in cosmological models with cold dark matter (CDM) and cold+hot dark matter (C+HDM) are reviewed, and useful analytical approximations are summarized. Cosmological numerical simulation results are then used to illustrate the process of nonlinear gravitational clustering and to compute the nonlinear power spectrum. An analytical approximation relating the linear and nonlinear power spectrum in C+HDM models is presented.