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arXiv 1306.0955astro-ph.CO
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CMB奇偶不对称性的方向相关性

Directional dependence of CMB parity asymmetry

Wen Zhao

摘要:

最近的普朗克观测证实了宇宙微波背景(CMB)辐射中的宇称违反。在本文中,我们扩展了我们以前的工作[P. Naselsky et al. Astrophys. J. { \bf 749},31(2012)]通过考虑CMB温度各向异性的普朗克数据,对CMB宇称不对称性的方向性质进行了研究。我们定义了六种方向统计量,发现它们都表明了CMB数据的奇校验偏好。此外,我们发现所有这些统计的首选轴强烈相关的CMB运动偶极子,四极,八极的首选轴。在大于$3σ$的置信水平下证实了它们之间的对齐,这意味着CMB宇称不对称以及CMB四极和八极的异常可能具有共同的物理、污染或系统起源。此外,它们都应该与残余偶极元件的可能污染有关。

英文摘要:

Parity violation in the cosmic microwave background (CMB) radiation has been confirmed by recent Planck observation. In this paper, we extend our previous work [P. Naselsky et al. Astrophys. J. {\bf 749}, 31 (2012)] on the directional properties of CMB parity asymmetry by considering the Planck data of the CMB temperature anisotropy. We define six kinds of the directional statistics and find that they all indicate the odd-parity preference of CMB data. In addition, we find the preferred axes of all these statistics strongly correlate with the preferred axes of the CMB kinematic dipole, quadrupole, and octopole. The alignment between them is confirmed at more than $3σ$ confidence level, which implies that the CMB parity asymmetry, and the anomalies of the CMB quadrupole and octopole, may have the common physical, contaminated or systematic origin. In addition, they all should be connected with the possible contamination of the residual dipole component.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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