A Preface to Cosmogony. I. The Energy Equation and the Virial Theorem for Cosmic Distributions.
A Preface to Cosmogony. I. The Energy Equation and the Virial Theorem for Cosmic Distributions.
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DOI：
10.1086/147625
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发表时间：
1963-07
期刊：
影响因子：
--
通讯作者：
D. Layzer
中科院分区：
文献类型：
--
作者：
D. Layzer
摘要本文讨论无界的、统计上均匀的、各向同性的引力粒子分布的动力学。众所周知，平均密度和速度场依赖于由相对论宇宙学给出的单一函数，即宇宙标度因子R{f。在对所有天文应用都足够的近似值中，测试粒子的特殊速度t满足运动方程。
ABSTRACT This paper deals with the dynamics of an unbounded, statistically homogeneous, and isotropic distribution of gravitating particles. As is well known, the mean density and velocity fields depend on a single function, the cosmic scale factor R{f), given by relativistic cosmology. In an approximation that is adequate for all astronomical applications, the peculiar velocity t; of a test particle is shown to satisfy the equations of motion