New constraints on Parity Symmetry from a re-analysis of the WMAP-7 low resolution power spectra

Abstract

The Parity symmetry of the Cosmic Microwave Background (CMB) pattern as seen by WMAP 7 is tested jointly in temperature and polarization at large angular scale. A Quadratic Maximum Likelihood (QML) estimator is applied to the WMAP 7 year low resolution maps to compute all polarized CMB angular power spectra. The analysis is supported by 10000 realistic Monte-Carlo realizations. We confirm the previously reported Parity anomaly for TT in the range $\delta \ell =[2,22]$ at $>99.5$ C.L.. No anomalies have been detected in TT for a wider $\ell$ range (up to ${\ell }_{max}=40$). No violations have been found for EE, TE and BB which we test here for the first time. The cross-spectra TB and EB are found to be consistent with zero. We also forecast {\sc Planck} capabilities in probing Parity violations on low resolution maps.

8 pages, 6 figures, 4 tables. Accepted for publication in MNRAS

References in corpus (8)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Likelihoods and Parameters from the WMAP data
• Hemispherical power asymmetry in the three-year Wilkinson Microwave Anisotropy Probe sky maps
• The Uncorrelated Universe: Statistical Anisotropy and the Vanishing Angular Correlation Function in WMAP Years 1-3
• Three-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Beam Profiles, Data Processing, Radiometer Characterization and Systematic Error Limits
• Global universe anisotropy probed by the alignment of structures in the cosmic microwave background
• Alignment tests for low CMB multipoles
• Alignment and signed-intensity anomalies in WMAP data
• Power Asymmetries in the Cosmic Microwave Background Temperature and Polarization patterns

Cited by in corpus (22)

• Challenges for $\Lambda$CDM: An update
• Is the Observable Universe Consistent with the Cosmological Principle?
• Detection of a Dipole in the Handedness of Spiral Galaxies with Redshifts z ~ 0.04
• Polarized primordial gravitational waves in the ghost-free parity-violating gravity
• Anisotropy of the Universe via the Pantheon supernovae sample revisited
• Constraining the anisotropy of the Universe via Pantheon supernovae sample
• Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies
• Testing cosmic anisotropy with Pantheon sample and quasars at high redshifts
• Can residuals of the Solar system foreground explain low multipole anomalies of the CMB ?
• A comparison of CMB Angular Power Spectrum Estimators at Large Scales: the TT case
• North-South non-Gaussian asymmetry in PLANCK CMB maps
• Constraining the anisotropy of the Universe with the X-ray and UV fluxes of quasars
• Symmetry and anti-symmetry of the CMB anisotropy pattern
• CMB low multipole alignments in the $\mathbf{\Lambda }$CDM and Dipolar models
• Testing CMB Anomalies in E-mode Polarization with Current and Future Data
• Asymmetry of the CMB map: local and global anomalies
• Parity in Planck full-mission CMB temperature maps
• Is the lack of power anomaly in the CMB correlated with the orientation of the Galactic plane?
• Multiscale analysis of the CMB temperature derivatives
• Unraveling the CMB lack-of-correlation anomaly with the cosmological gravitational wave background
• Nearly Full-Sky Low-Multipole Cosmic Microwave Background Temperature Anisotropy: III. CMB Temperature Anomalies
• The Crab Nebula as a Calibrator for wide-beam Cosmic Microwave Background polarization surveys