Cosmology from the kinetic polarized Sunyaev Zel'dovich effect
Cosmology from the kinetic polarized Sunyaev Zel'dovich effect
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DOI：
10.1088/1475-7516/2022/10/026
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发表时间：
2022-04
影响因子：
6.4
通讯作者：
Selim C. Hotinli;G. Holder;M. Johnson;M. Kamionkowski
中科院分区：
文献类型：
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作者：
Selim C. Hotinli;G. Holder;M. Johnson;M. Kamionkowski
在大尺度结构中散射自由电子的宇宙微波背景（CMB）光子诱导线性极化模式，与在电子静止坐标系中观察到的远程CMB温度四极成比例。相关的黑体偏振各向异性被称为偏振Sunyaev Zel'dovich（pSZ）效应。相对论修正远程四极场引起的非黑体极化各向异性的平方成比例的横向特有的速度场，这是动力极化的Sunyaev Zel'dovich（kpSZ）的效果。在本文中，我们预测未来的CMB和星系调查，以检测kpSZ效应的能力，发现一个统计上显着的检测是在计划的实验范围内。我们进一步介绍了一个二次估计的平方的奇特的速度场的基础上的星系调查和CMB偏振。最后，我们概述了kpSZ效应是如何探测宇宙双折射和原始非高斯性的，预测了未来实验的范围。
The cosmic microwave background (CMB) photons that scatter off free electrons in the large-scale structure induce a linear polarization pattern proportional to the remote CMB temperature quadrupole observed in the electrons' rest frame. The associated blackbody polarization anisotropies are known as the polarized Sunyaev Zel'dovich (pSZ) effect. Relativistic corrections to the remote quadrupole field give rise to a non-blackbody polarization anisotropy proportional to the square of the transverse peculiar velocity field; this is the kinetic polarized Sunyaev Zel'dovich (kpSZ) effect. In this paper, we forecast the ability of future CMB and galaxy surveys to detect the kpSZ effect, finding that a statistically significant detection is within the reach of planned experiments. We further introduce a quadratic estimator for the square of the peculiar velocity field based on a galaxy survey and CMB polarization. Finally, we outline how the kpSZ effect is a probe of cosmic birefringence and primordial non-Gaussianity, forecasting the reach of future experiments.