Imprints of Spherical Nontrivial Topologies on the Cosmic Microwave Background

Anastasia Niarchou and Andrew Jaffe
Phys. Rev. Lett. 99, 081302 – Published 24 August 2007

Abstract

The apparent low power in the cosmic microwave background (CMB) temperature anisotropy power spectrum derived from the Wilkinson Microwave Anisotropy Probe motivated us to consider the possibility of a nontrivial topology. We focus on simple spherical multiconnected manifolds and discuss their implications for the CMB in terms of the power spectrum, maps, and the correlation matrix. We perform a Bayesian model comparison against the fiducial best-fit cold dark matter model with a cosmological constant based both on the power spectrum and the correlation matrix to assess their statistical significance. We find that the first-year power spectrum shows a slight preference for the truncated cube space, but the three-year data show no evidence for any of these spaces.

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  • Received 16 February 2007

DOI:https://doi.org/10.1103/PhysRevLett.99.081302

©2007 American Physical Society

Authors & Affiliations

Anastasia Niarchou and Andrew Jaffe

  • Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2AZ, United Kingdom

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Issue

Vol. 99, Iss. 8 — 24 August 2007

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