Is the Cosmic Microwave Background Asymmetry due to the Kinematic Dipole?

TY - JOUR

T1 - Is the Cosmic Microwave Background Asymmetry due to the Kinematic Dipole?

AU - Nasselski, Pavel

AU - Zhao, Wen

AU - Kim, Jaiseung

AU - Chen, S.

PY - 2012/4/10

Y1 - 2012/4/10

N2 - 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 ∼ 22.

AB - 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 ∼ 22.

U2 - 10.1088/0004-637X/749/1/31

DO - 10.1088/0004-637X/749/1/31

M3 - Journal article

SN - 0004-637X

VL - 749

SP - 31

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

ER -