Bipolar Harmonic encoding of CMB correlation patterns

Details Bipolar Harmonic encoding of CMB correlation patterns Bipolar Harmonic encoding of CMB correlation patterns

2009-12-16

arxiv.org/abs/0912.3217v2

Phys.Rev.D81:083012,2010

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

Revised version, accepted for publication in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.81.083012

Deviations from statistical isotropy can be modeled in various ways, for instance, anisotropic cosmological models (Bianchi models), compact topologies and presence of primordial magnetic field. Signature of anisotropy manifests itself in CMB correlation patterns. Here we explore the symmetries of the correlation function and its implications on the observable measures constructed within the Bipolar harmonic formalism for these variety of models. Different quantifiers within the Bipolar harmonic representation are used to distinguish between plausible models of breakdown of statistical isotropy and as a spectroscopic tool for discriminating between distinct cosmic topology.

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