An Isocurvature Cold Dark Matter Cosmogony. II. Observational Tests
An Isocurvature Cold Dark Matter Cosmogony. II. Observational Tests
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等曲率冷暗物质宇宙起源。
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
Joseph Henry
中科院分区：
文献类型：
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作者：
P. Peebles;Joseph Henry
一个配套文件提出了一个工作模型的演变，通过通货膨胀到初始条件的isocurvature模型的结构形成。它在这里示出的模型是一致的，可用的观测约束，可以应用，而无需数值模拟的帮助。该模型给出了一个一般良好的拟合的热宇宙背景辐射和星系的分布，可能需要一个特殊的调整，以适应COBE测量的斜率的波动谱在大的角尺度上。星系团的质量函数需要一个相当低但观测上可以接受的质量密度，在宇宙学平坦的宇宙中为0.1 <$Ω <$0.2。在这个模型中，半导体的组装比绝热模型要早，这是一件可以说是好事。在这个模型中的热背景辐射的各向异性的预测非高斯字符方面进行了讨论。
A companion paper presents a worked model for evolution through inflation to initial conditions for an isocurvature model for structure formation. It is shown here that the model is consistent with available observational constraints that can be applied without the help of numerical simulations. The model gives a generally good fit to the distributions of the thermal cosmic background radiation and the galaxies, with the possible need for a special adjustment to fit the COBE measurement of the slope of the fluctuation spectrum on large angular scales. The mass function for clusters of galaxies requires a rather low but observationally acceptable mass density, 0.1≲Ω≲0.2 in a cosmologically flat universe. Galaxies would be assembled earlier in this model than in the adiabatic version, an arguably good thing. Aspects of the predicted non-Gaussian character of the anisotropy of the thermal background radiation in this model are discussed.