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arXiv 2108.02207astro-ph.CO
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具有移动透镜效应的宇宙学

Cosmology with the moving lens effect

Selim C. Hotinli, Kendrick M. Smith, Mathew S. Madhavacheril, Marc Kamionkowski

摘要:

速度场对宇宙微波背景和大尺度结构之间的相关性的影响可以在宇宙学尺度上重建。引起这种相关性的效应包括动力学Sunyaev Zel'dovich(kSZ)效应和移动透镜效应,这两种效应都将在即将到来的宇宙学实验中得到高精度的测量。星系测量也提供了一个窗口,从红移空间扭曲(RSD)的影响来测量速度。然而,可以从kSZ或RSD获得的信息受到天体物理学不确定性和系统效应的限制,这可能会大大降低我们约束宇宙学参数(如$fσ_8$)的能力。在本文中,我们展示了如何大规模的横向速度场,它可以从移动透镜效应的测量重建,可以用来测量$fσ_8$,以高精度。

英文摘要:

Velocity fields can be reconstructed at cosmological scales from their influence on the correlation between the cosmic microwave background and large-scale structure. Effects that induce such correlations include the kinetic Sunyaev Zel'dovich (kSZ) effect and the moving-lens effect, both of which will be measured to high precision with upcoming cosmology experiments. Galaxy measurements also provide a window into measuring velocities from the effect of redshift-space distortions (RSDs). The information that can be accessed from the kSZ or RSDs, however, is limited by astrophysical uncertainties and systematic effects, which may significantly reduce our ability to constrain cosmological parameters such as $fσ_8$. In this paper, we show how the large-scale transverse-velocity field, which can be reconstructed from measurements of the moving-lens effect, can be used to measure $fσ_8$ to high precision.

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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