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arXiv 0804.1826astro-ph
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光通过宇宙中大尺度不均匀性的传播及其对宇宙学观测的影响

Light propagation through large-scale inhomogeneities in the Universe and its impact on cosmological observations

Krzysztof Bolejko

摘要:

本文分析了爱因斯坦方程的非齐次精确解中的宇宙学观测。在某种程度上,这里提出的分析可以从假设中解放出来,例如密度对比度的小幅度。超新星观测用Lema \itre -Tolman模型分析,CMB观测用准球Szekeres模型分析。结果表明,在不考虑宇宙学常数的情况下,对超新星数据进行拟合是可能的。然而,如果考虑到在局部宇宙中观察到的大小和振幅的不均匀性,它们对宇宙学观测的影响很小。

英文摘要:

This paper analyses cosmological observations within inhomogeneous and exact solutions of the Einstein equations. In some way the analyses presented here can be freed from assumptions such as small amplitude of the density contrast. The supernova observations are analysed using the Lema\itre-Tolman model and the CMB observations are analysed using the quasispherical Szekeres model. The results show that it is possible to fit the supernova data without the cosmological constant. However if inhomogeneities of sizes and amplitudes as observed in the local Universe are considered, their impact on cosmological observations is small.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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