Global Universe Anisotropy Probed by the Alignment of Structures in the Cosmic Microwave Background
- 21 April 2006
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 96 (15) , 151303
- https://doi.org/10.1103/physrevlett.96.151303
Abstract
We question the global universe isotropy by probing the alignment of local structures in the cosmic microwave background (CMB) radiation. The original method proposed relies on a steerable wavelet decomposition of the CMB signal on the sphere. The analysis of the first-year Wilkinson Microwave Anisotropy Probe data identifies a mean preferred plane with a normal direction close to the CMB dipole axis, and a mean preferred direction in this plane, very close to the ecliptic poles axis. Previous statistical anisotropy results are thereby synthesized, but further analyses are still required to establish their origin.Keywords
All Related Versions
This publication has 29 references indexed in Scilit:
- TheN‐Point Correlation Functions of the First‐YearWilkinson Microwave Anisotropy ProbeSky MapsThe Astrophysical Journal, 2005
- Cubic anomalies in theWilkinson Microwave Anisotropy ProbeMonthly Notices of the Royal Astronomical Society, 2005
- Isotropy of the early universe from CMB anisotropiesPhysical Review D, 2005
- Is the Low-Microwave Background Cosmic?Physical Review Letters, 2004
- Polynomial interpretation of multipole vectorsPhysical Review D, 2004
- Multipole vectors: A new representation of the CMB sky and evidence for statistical anisotropy or non-Gaussianity at 2⩽l⩽8Physical Review D, 2004
- Asymmetries in the Local Curvature of the Wilkinson Microwave Anisotropy Probe DataThe Astrophysical Journal, 2004
- Asymmetries in the Cosmic Microwave Background Anisotropy FieldThe Astrophysical Journal, 2004
- First‐Year Wilkinson Microwave Anisotropy Probe ( WMAP ) Observations: Determination of Cosmological ParametersThe Astrophysical Journal Supplement Series, 2003
- Gabor transforms on the sphere with applications to CMB power spectrum estimationMonthly Notices of the Royal Astronomical Society, 2002