Secondary CMB anisotropies from bulk motions in the presence of stochastic magnetic fields

被引：6

作者：

Kunze, Kerstin E. ^{[1
,2
]}

机构：

[1] Univ Salamanca, Dept Fis Fundamental, E-37008 Salamanca, Spain

[2] Univ Salamanca, IUFFyM, E-37008 Salamanca, Spain

来源：

PHYSICAL REVIEW D | 2014年 / 89卷 / 10期

关键词：

MICROWAVE BACKGROUND ANISOTROPIES; POWER SPECTRUM; REIONIZATION; PERTURBATIONS; FLUCTUATIONS; GENERATION; ERA;

D O I：

10.1103/PhysRevD.89.103016

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Bulk motions of electrons along the line of sight induce secondary temperature fluctuations in the postdecoupling, reionized Universe. In the presence of a magnetic field not only the scalar mode but also the vector mode act as a source for the bulk motion. The resulting angular power spectrum of temperature anisotropies of the cosmic microwave background is calculated assuming a simple model of reionization. Contributions from the standard adiabatic, curvature mode and a nonhelical magnetic field are included. The contribution due to magnetic fields with field strengths of order nG and negative magnetic spectral indices becomes important for multipoles larger than l similar to 10(4).

引用

页数：8

共 37 条

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