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 $f{\sigma }_8$. 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 $f{\sigma }_8$ to high precision.

中文翻译：

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具有移动镜头效应的宇宙学

速度场可以根据它们对宇宙微波背景和大尺度结构之间相关性的影响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) 效应和移动镜头效应，这两种效应都将通过即将进行的宇宙学实验进行高精度测量。星系测量还提供了一个窗口，可以从红移空间失真 (RSD) 的影响测量速度。然而，可以从 kSZ 或 RSD 获取的信息受到天体物理不确定性和系统效应的限制，这可能会显着降低我们限制宇宙学参数的能力，例如$F{\sigma }_8$. 在本文中，我们展示了如何使用可从移动镜头效应的测量中重建的大尺度横向速度场来测量$F{\sigma }_8$ 到高精度。