IS THE COSMIC MICROWAVE BACKGROUND ASYMMETRY DUE TO THE KINEMATIC DIPOLE?

被引：34
|
作者：
Naselsky, P. [1 ,2 ]
Zhao, W. [1 ,2 ]
Kim, J. [1 ,2 ]
Chen, S. [1 ,2 ]
机构：
[1] Niels Bohr Inst, Blegdamsvej 17, DK-2100 Copenhagen O, Denmark
[2] Discovery Ctr, Blegdamsvej 17, DK-2100 Copenhagen O, Denmark
来源：
ASTROPHYSICAL JOURNAL | 2012年 / 749卷 / 01期
关键词：
cosmic background radiation; early Universe; methods: data analysis; methods: statistical; PROBE WMAP OBSERVATIONS; PARITY;
D O I：
10.1088/0004-637X/749/1/31
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Parity violation found in the cosmic microwave background (CMB) radiation is a crucial clue for the non-standard cosmological model or the possible contamination of various foreground residuals and/or calibration of the CMB data sets. In this paper, we study the directional properties of the CMB parity asymmetry by excluding the m = 0 modes in the definition of parity parameters. We find that the preferred directions of the parity parameters coincide with the CMB kinematic dipole, which implies that the CMB parity asymmetry may be connected with the possible contamination of the residual dipole component. We also find that such tendency is not only localized at l = 2, 3, but in the extended multipole ranges up to l similar to 22.
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页数：7
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