Examination of evidence for a preferred axis in the cosmic radiation anisotropy.
Examination of evidence for a preferred axis in the cosmic radiation anisotropy.
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DOI：
10.1103/physrevlett.95.071301
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发表时间：
2005-08
影响因子：
8.6
通讯作者：
K. Land;J. Magueijo
中科院分区：
文献类型：
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作者：
K. Land;J. Magueijo
我们检查以前的索赔的首选轴（B，l）约（60，-100）的宇宙辐射各向异性，通过推广多极平面性的概念，任何形状的偏好。与先前的说法相反，我们发现，在平面模式的l = 2，3的功率集中的量是不一致的各向同性和高斯性。然而，多极子的排列确实是异常的，并且延伸到l = 5，以超过99.9%的概率拒绝统计各向同性。在l = 3和l = 5之间，方位角相位也存在不可思议的相关性。我们无法将这些影响归咎于前景污染或大规模系统误差。这种重新评估可能对确定异常现象背后的理论模型至关重要。
We examine previous claims for a preferred axis at (b,l) approximately (60,-100) in the cosmic radiation anisotropy, by generalizing the concept of multipole planarity to any shape preference. Contrary to earlier claims, we find that the amount of power concentrated in planar modes for l = 2,3 is not inconsistent with isotropy and Gaussianity. The multipoles' alignment, however, is indeed anomalous, and extends up to l = 5 rejecting statistical isotropy with a probability in excess of 99.9%. There is also an uncanny correlation of azimuthal phases between l = 3 and l = 5. We are unable to blame these effects on foreground contamination or large-scale systematic errors. This reappraisal may be crucial in identifying the theoretical model behind the anomaly.