关于宇宙微波背景中的(高多极)方差不对称问题

MohammadHossein Jamshidi, Abdolali Banihashemi, Nima Khosravi
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摘要

我们研究了宇宙微波背景(CMB)图,寻找宇宙学各向同性之外的特征。我们首先在 CMB 方差图(由不同的平滑尺度产生)上沿最突出的偶极子方向铺上不同大小的条纹。我们证实了之前关于偶极子重要性的发现。此外,我们还发现,一些较高的多极子表现出与偶极子相当的重要性,这自然取决于平滑尺度。最后,我们讨论了这一结果,并关注了 "看别处效应"。我们相信,我们的结果可能表明 CMB 天空中存在一个异常区,值得进一步研究。
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On the (higher multipoles) variance asymmetry in the cosmic microwave background
We have studied the cosmic microwave background (CMB) map looking for features beyond cosmological isotropy. We began by tiling the CMB variance map (which are produced by different smoothing scales) with stripes of different sizes along the most prominent dipole direction. We were able to confirm previous findings regarding the significance of the dipole. Furthermore, we discovered that some of the higher multipoles exhibit significance comparable to the dipole which naturally depends on the smoothing scales. At the end, we discussed this result having an eye on look-elsewhere-effect. We believe our results may indicate an anomalous patch in the CMB sky that warrants further investigation.
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