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Redshifted HI 21-cm Signal from the Post-Reionization Epoch: Cross-Correlations with Other Cosmological Probes

机译:后电离时代的红移HI 21厘米信号:与其他宇宙学探针的互相关

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摘要

Tomographicintensity mapping of the HI using the redshifted 21-cm observations opens up a new window towards our understanding of cosmological background evolution and structure formation. This is a key science goal of several upcoming radio telescopes including the Square Kilometer Array (SKA). In this article, we focus on the post-reionization signal and investigate the cross correlating of the 21-cm signal with other tracers of the large scale structure. We consider the cross-correlation of the post-reionization 21-cm signal with the Lyman-alpha forest, Lyman-break galaxies and late time anisotropies in the CMBR maps like weak lensing and the integrated SachsWolfe effect. We study the feasibility of detecting the signal and explore the possibility of obtaining constraints on cosmologicalmodels using it.
机译:使用红移的21厘米观测值对HI的层析成像强度作图,为我们了解宇宙背景演变和结构形成打开了一个新窗口。这是包括平方公里阵列(SKA)在内的几种即将推出的射电望远镜的关键科学目标。在本文中,我们重点关注后电离信号,并研究21厘米信号与其他大规模结构示踪剂的交叉相关性。我们考虑了电离后21厘米信号与CMBR图中的莱曼-阿尔法森林,莱曼断裂星系和较晚时间各向异性的互相关性,例如弱透镜和集成的SachsWolfe效应。我们研究了检测信号的可行性,并探讨了使用该信号获得宇宙模型约束的可能性。

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