Nonlinear kinetic Sunyaev-Zeldovich effect.
Nonlinear kinetic Sunyaev-Zeldovich effect.
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DOI：
10.1103/physrevlett.88.211301
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发表时间：
2001-06
影响因子：
8.6
通讯作者：
Chung-Pei Ma;James N. Fry
中科院分区：
文献类型：
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作者：
Chung-Pei Ma;James N. Fry
我们从动力学Sunyaev-Zeldovich （SZ）效应中推导出温度波动的完全非线性表达式，即宇宙微波背景光子在体运动中与热电子的散射。我们的结果再现了Ostriker-Vishniac效应在微扰理论中的二阶，但包含了先前忽略的电子速度和密度的非线性修正。我们使用最近发展的非线性引力聚类的光晕模型来计算非线性动力学SZ功率谱，该功率谱在小角尺度上主导了主要的各向异性。
We derive fully nonlinear expressions for temperature fluctuations from the kinetic Sunyaev-Zeldovich (SZ) effect, the scattering of cosmic microwave background photons off hot electrons in bulk motion. Our result reproduces the Ostriker-Vishniac effect to second order in perturbation theory but contains nonlinear corrections to the electron velocities and densities that were neglected previously. We use the recently developed halo model for nonlinear gravitational clustering to compute the nonlinear kinetic SZ power spectrum, which dominates the primary anisotropy on small angular scales.