CMB distortion anisotropies due to the decay of primordial magnetic fields
CMB distortion anisotropies due to the decay of primordial magnetic fields
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DOI：
10.1103/physrevd.89.063508
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发表时间：
2013-10
影响因子：
5
通讯作者：
Koichi Miyamoto;Toyokazu Sekiguchi;H. Tashiro;Shuichiro Yokoyama
中科院分区：
文献类型：
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作者：
Koichi Miyamoto;Toyokazu Sekiguchi;H. Tashiro;Shuichiro Yokoyama
我们研究了原始磁场衰变引起的宇宙微波背景(CMB)失真的功率谱。我们知道有两种类型的CMB失真，即所谓的u型和y型，我们发现y型失真的信号变得比u型失真的信号大。我们还讨论了CMB扭曲和CMB温度各向异性之间的交叉功率谱，这是由于原始磁场的存在而自然产生的。我们发现，由于温度各向异性的Silk阻尼效应，这种交叉功率谱与CMB扭曲的自功率谱相比具有较小的幅度。我们还研究了在未来的CMB实验中检测这种信号的可能性，不仅包括绝对校准的实验，如Pixie，还包括相对校准的实验，如LiteBIRD和CMBpol。
We investigate the power spectrum of the distortion of Cosmic Microwave Background (CMB) due to the decay of the primordial magnetic fields. It is known that there are two-types of the CMB distortions, so-called µ- and y-types and we find that the signal of the y-type distortion becomes larger than that of the µ-type one. We also discuss cross power spectra between the CMB distortions and the CMB temperature anisotropy, which are naturally generated due to the existence of the primordial magnetic fields. We find that such cross power spectra have small amplitudes compared with the auto-power spectra of the CMB distortions because of the Silk damping effect of the temperature anisotropy. We also investigate the possibility of detecting such signal in the future CMB experiments, including not only absolutely calibrated experiments such as PIXIE but also relatively calibrated experiments such as LiteBIRD and CMBpol.