宇宙学原理检验研究概述

A Brief Review on the Research of Testing of Cosmological Principle

本文简要介绍了宇宙学原理检验的相关工作。首先介绍了几种宇宙学模型,接着简单地描述了目前宇宙学中仍待解决的一些反常发现。由于这些反常发现,宇宙学原理假设似乎并非一定是正确的。于是研究者们采用了不同的方法和数据对宇宙学原理进行了检验,在相关研究中大多数结果是支持宇宙学原理假设的,然而在一些数据中发现了可能违背宇宙学原理的反常信号,这些反常信号的出现似乎意味着宇宙存在一个特殊的膨胀方向。此外,大尺度结构的反常发现似乎也暗示宇宙有也可能是非均匀的。迄今为止,人们还没有发现确凿和明显违背宇宙学原理的证据。

This paper presents a brief introduction on the research of testing of cosmological principles. Firstly, we introduce several cosmological models, and then we simply describe cosmological anomalies which need to be solved in the future. The Cosmological Principle hypothesis seems to be not exactly correct because of these anomalies, thus, researchers employed different methods and data to test the Cosmological Principle. Most of the results supported the hypothesis of the Cosmological Principles. However, few anomalous signals are found in some works that may violate the Cosmological Principles. The emergence of the abnormal signal means that the universe has a preferred expansion direction. Moreover, the abnormal discovery of large-scale structures implies that the universe may be inhomogeneity. Up to now, there is no acceptable and clear evidence for violation of Cosmo-logical Principle.