E-de S宇宙模型[Einstein-de Sitter Cosmological Model] - 达人(其实～我是卧底，来自外星)

2004/10/29 | E-de S宇宙模型[Einstein-de Sitter Cosmological Model]
类别(Ω〖物理〗) | 评论(0) | 阅读(58) | 发表于 15:04: A cosmological model (not to be confused with the de Sitter cosmological model)which assumes a homogeneous, isotropic, constant curvature universe with zero cosmological constant and pressure P,
(1)

Its equation of motion, derived from the Einstein field equations, is
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where a is the expansion parameter,H is the Hubble constant,G is the gravitational constant,and is the density. For constant mass of the universe M,
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Therefore,
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so
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For small densities,
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(15); 0