arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2006.03060astro-ph.CO
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移动透镜效果的最佳滤波器

Optimal filters for the moving lens effect

Selim C. Hotinli, Matthew C. Johnson, Joel Meyers

摘要:

我们评估的前景检测移动透镜效应使用宇宙学调查。宇宙结构的整体运动导致了宇宙微波辐射(CMB)的小尺度偶极温度各向异性,以晕为中心,沿横向速度场取向。我们为此信号引入了一组最佳滤波器,并预测在即将进行的实验中可以进行高显著性检测。我们讨论的前景,重建散装横向速度场的大尺度上使用匹配滤波器,找到良好的协议与以前的工作,使用二次估计。

英文摘要:

We assess the prospects for detecting the moving lens effect using cosmological surveys. The bulk motion of cosmological structure induces a small-scale dipolar temperature anisotropy of the cosmic microwave radiation (CMB), centered around halos and oriented along the transverse velocity field. We introduce a set of optimal filters for this signal, and forecast that a high significance detection can be made with upcoming experiments. We discuss the prospects for reconstructing the bulk transverse velocity field on large scales using matched filters, finding good agreement with previous work using quadratic estimators.

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