Effects of helical magnetic fields on the cosmic microwave background
Effects of helical magnetic fields on the cosmic microwave background
复制标题
螺旋磁场对宇宙微波背景的影响
DOI：
10.1103/physrevd.85.083004
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发表时间：
2011
影响因子：
5
通讯作者：
K. Kunze
中科院分区：
文献类型：
--
作者：
K. Kunze
本文对随机螺旋磁场中宇宙微波背景的温度各向异性和极化进行了完整的数值计算，其中包括标量模、矢量模和张量模的贡献。数值计算了磁场贡献的相关函数，包括高斯窗函数，以有效地切断由于阻尼的磁场谱。除了奇偶偶相关性的螺旋性质的磁场诱导奇偶奇相关性之间的$E$和$B$模式的极化，以及温度（$T$）和极化$B$模式。
A complete numerical calculation of the temperature anisotropies and polarization of the cosmic microwave background in the presence of a stochastic helical magnetic field is presented which includes the contributions due to scalar, vector and tensor modes. The correlation functions of the magnetic field contributions are calculated numerically including a Gaussian window function to effectively cut off the magnetic field spectrum due to damping. Apart from parity-even correlations the helical nature of the magnetic field induces parity-odd correlations between the $E$ and $B$ mode of polarization as well as between temperature ($T$) and the polarization $B$ mode.