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arXiv · astro-ph/0603367

Global universe anisotropy probed by the alignment of structures in the cosmic microwave background

Y. Wiaux·P. Vielva·E. Martinez-Gonzalez·P. Vandergheynst
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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 WMAP 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.

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Y. Wiaux, P. Vielva, E. Martinez-Gonzalez, P. Vandergheynst. 2006-03-14. Global universe anisotropy probed by the alignment of structures in the cosmic microwave background. https://doi.org/10.1103/physrevlett.96.151303

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