Preferred axis of CMB parity asymmetry in the masked maps
文献类型：期刊论文
| 作者 | Cheng, C; Zhao, W; Huang, QG ; Santos, L; Zhao, W (reprint author), Univ Sci & Technol China, Chinese Acad Sci, Dept Astron, CAS Key Lab Res Galaxies & Cosmol, Hefei 230026, Anhui, Peoples R China.
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| 刊名 | PHYSICS LETTERS B
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| 出版日期 | 2016 |
| 卷号 | 757页码:445-453 |
| DOI | http://dx.doi.org/10.1016/j.physletb.2016.04.030 |
| 英文摘要 | Both WMAP and Planck data show a significant odd-multipole preference in the large scales of the cosmic microwave background (CMB) temperature anisotropies. If this pattern originates from cosmological effects, then it can be considered a crucial clue for a violation in the cosmological principle. By defining various direction dependent statistics in the full-sky Planck 2015 maps (see, for instance, Naselsky et al. (2012); W. Zhao (2014)), we found that the CMB parity asymmetry has a preferred direction, which is independent of the choices of the statistics. In particular, this preferred axis is strongly aligned with those in the CMB quadrupole and octopole, as well as that in the CMB kinematic dipole, which hints to their non-cosmological origin. In realistic observations, the foreground residuals are inevitable, and should be properly masked out in order to avoid possible misinterpretation of the results. In this paper, we extend our previous analyses to the masked Planck 2015 data. By defining a similar direction dependent statistic in the masked map, we find a preferred direction of the CMB parity asymmetry, in which the axis also coincides with that found in the full-sky analysis. Therefore, our conclusions on the CMB parity violation and its directional properties are confirmed. (C) 2016 The Authors. Published by Elsevier B.V. |
| 学科主题 | Astronomy & Astrophysics ; Physics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/21622]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 通讯作者 | Zhao, W (reprint author), Univ Sci & Technol China, Chinese Acad Sci, Dept Astron, CAS Key Lab Res Galaxies & Cosmol, Hefei 230026, Anhui, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Cheng, C,Zhao, W,Huang, QG,et al. Preferred axis of CMB parity asymmetry in the masked maps[J]. PHYSICS LETTERS B,2016,757:445-453. |
| APA | Cheng, C,Zhao, W,Huang, QG,Santos, L,&Zhao, W .(2016).Preferred axis of CMB parity asymmetry in the masked maps.PHYSICS LETTERS B,757,445-453. |
| MLA | Cheng, C,et al."Preferred axis of CMB parity asymmetry in the masked maps".PHYSICS LETTERS B 757(2016):445-453. |
入库方式： OAI收割
来源：理论物理研究所
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