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

Yves Wiaux, P. Vielva, E. Martínez-González, Pierre Vandergheynst

Research output: Contribution to journalArticle

69 Citations (Scopus)

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.

Original languageEnglish
Article number151303
Number of pages4
JournalPhysical Review Letters
Volume96
Issue number15
DOIs
Publication statusPublished - Apr 2006

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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