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

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

2006-03-14

arxiv.org/abs/astro-ph/0603367v1

Phys.Rev.Lett. 96 (2006) 151303

Astronomy and Astrophysics

Astrophysics

4 pages, 2 figures, Revtex4, Submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.96.151303

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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