Constraints on the multi-lognormal magnetic elds from the observations of the cosmic microwave background and the matter power spectrum
Constraints on the multi-lognormal magnetic elds from the observations of the cosmic microwave background and the matter power spectrum
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宇宙微波背景和物质功率谱观测对多对数正态磁场的约束
DOI：
10.1103/physrevd.88.103011
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发表时间：
2013
影响因子：
5
通讯作者：
Keitaro Takahashi
中科院分区：
文献类型：
--
作者：
Dai G. Yamazaki;Kiyotomo Ichiki;Keitaro Takahashi
原初磁场（PMF）是在早期宇宙重组前产生的，它影响等离子体的运动，进而影响宇宙微波背景辐射和物质功率谱。我们考虑从宇宙微波背景和物质功率谱的各向异性的观测与特征相关长度的PMFs的约束。PMF的谱用多对数正态分布而不是幂律分布来建模，并且我们导出了每个波数与平坦宇宙和前景源中的标准宇宙学参数一起对PMF谱的约束。我们得到的上界场强分别为4.7 nG、2.1 nG、5.3 nG和10.9 nG（C.L.）而场强度则有一个有限值，为（C.L.）。这一有限值是由于在QUAD实验中得到的负宇称（BB模）偏振数据的有限值引起的。如果我们不包括BB模式的数据，我们只得到上界。
Primordial magnetic fields (PMFs), which were generated in the early Universe before recombination, affect the motion of plasma and then the cosmic microwave background and the matter power spectrum. We consider constraints on PMFs with a characteristic correlation length from the observations of the anisotropies of the cosmic microwave background and matter power spectrum. The spectrum of PMFs is modeled with multi-lognormal distributions rather than power-law distribution, and we derive constraints on the strengthat each wave numberalong with the standard cosmological parameters in the flat Universe and the foreground sources. We obtain upper bounds on the field strengths at,,andas 4.7 nG, 2.1 nG, 5.3 nG, and 10.9 nG (C.L.) respectively, while the field strength atturns out to have a finite value as(C.L.). This finite value is attributed to the finite values of the polarization with negative parity (BB mode) data atobtained from the QUAD experiment. If we do not include the BB mode data, we obtain only the upper bound on.