Rogues' gallery: The full freedom of the Bianchi CMB anomalies

Journal Article · Fri May 15 04:00:00 EDT 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.79.103518· OSTI ID:21296323

Pontzen, Andrew ^[1]

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1. Institute of Astronomy, Madingley Road, Cambridge CB3 0HA (United Kingdom)

Combining a recent derivation of the CMB evolution equations for homogeneous but anisotropic (Bianchi) cosmologies with an account of the full linearized dynamical freedoms available in such models, I calculate and discuss the various temperature and polarization anisotropy patterns that may be formed. Certain anisotropies can be hidden in superhorizon modes at early times, thus avoiding any constraints from nucleosynthesis, while nevertheless producing nontrivial redshift-zero temperature patterns in flat and open universes. The results are likely to be more of pedagogical than observational interest, but future work will assess whether such patterns can be matched to anomalies in WMAP results.

• OSTI ID: 21296323
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 10 Vol. 79; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANISOTROPY
COSMOLOGY
EQUATIONS
EVOLUTION
NUCLEOSYNTHESIS
POLARIZATION
RED SHIFT
RELICT RADIATION
UNIVERSE