Galaxy clusters as probes of cosmic isotropy.

IF 4.3 3区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES
Konstantinos Migkas
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引用次数: 0

Abstract

Scaling relations of galaxy clusters are a powerful probe of cosmic isotropy in the late Universe. Owing to their strong cosmological dependence, galaxy cluster scaling relations can obtain tight constraints on the spatial variation of cosmological parameters, such as the Hubble constant ([Formula: see text]), and detect large-scale bulk flow motions. Such tests are crucial to scrutinise the validity of [Formula: see text]CDM in the local Universe and determine at what cosmic scales (if any) extra-galactic objects converge to isotropy within the cosmic microwave background rest frame. This review describes the methodology for conducting cosmic isotropy tests with cluster scaling relations and examines possible systematic biases. We also discuss the results of past studies that reported statistically significant observed anisotropies in the local Universe. Finally, we explore the future potential of cluster scaling relations as a cosmic isotropy probe given the large amount of multi-wavelength cluster data expected in the near future.This article is part of the discussion meeting issue 'Challenging the standard cosmological model'.

星系团作为宇宙各向同性的探测器。
星系团的尺度关系是研究晚期宇宙各向同性的有力手段。由于星系团尺度关系具有很强的宇宙学依赖性,因此星系团尺度关系可以对哈勃常数等宇宙学参数的空间变化获得严格的约束(公式:见文),并可以探测到大尺度的体流运动。这样的测试对于检验本地宇宙中CDM的有效性和确定在宇宙微波背景静止框架内星系外物体在什么宇宙尺度(如果有的话)收敛到各向同性是至关重要的。这篇综述描述了用簇标度关系进行宇宙各向同性测试的方法,并检查了可能的系统偏差。我们还讨论了过去的研究结果,这些研究报告了在局部宇宙中观测到的统计上显著的各向异性。最后,我们探讨了星团尺度关系作为宇宙各向同性探测器的未来潜力,因为预计在不久的将来会有大量的多波长星团数据。本文是讨论会议“挑战标准宇宙学模型”的一部分。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
9.30
自引率
2.00%
发文量
367
审稿时长
3 months
期刊介绍: Continuing its long history of influential scientific publishing, Philosophical Transactions A publishes high-quality theme issues on topics of current importance and general interest within the physical, mathematical and engineering sciences, guest-edited by leading authorities and comprising new research, reviews and opinions from prominent researchers.
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