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宇宙中大尺度非线性结构 被引量:1

LARGE SCALE NONLINEAR STRUCTURES IN THE UNIVERSE
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摘要 宇宙物质在大尺度上成团是宇宙学的基本问题.本文综述了金斯理论和泽利多维奇近似,指出:双成分自引力系统的非线性相互作用的动力学描述是大尺度成团的现代研究课题. 详述了过去在这个课题方面被我们获得的结果.表明:自引力系统的结构可由一组非线性藕合方程描写:扰动场能塌缩并形成类薄饼结构.在宇宙条件下,我们得到了星系团、超团和巨洞的特征尺度. The clustering of cosmic matter on large scale is a fundamental problem in cosmology. In this paper the review on Jeans theory and Zel'dovich approximation is presented, It is shown that kinetic description of a two-component self-gravitating systems with nonlinear interaction is a modern research subject on the clustering.The results obtained by us concerning the subject are presented. It is shown that the structures of self-gravitating systems can be described by nonlinear coupling equations; the perturbation fields may collapse and form a pancake-like structure, For cosmic condition, we obtained the characteristic scales of the clusters, the superclusters and the voids.
作者 李晓卿
出处 《紫金山天文台台刊》 北大核心 1991年第3期161-187,共27页
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