title: Imprints of spherical nontrivial topologies on the cosmic microwave background.
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.
authors.affiliation: Blackett Laboratory, Imperial College London, Prince Consort Road, London, UK.
authors.forename: Anastasia
authors.initials: A
authors.lastname: Niarchou
authors.forename: Andrew
authors.initials: A
authors.lastname: Jaffe
mesh_terms: D016880:Anisotropy; D001499:Bayes Theorem; D003359:Cosmic Radiation; D005118:Extraterrestrial Environment; D006112:Gravitation; D008872:Microwaves; D008962:Models, Theoretical; D013696:Temperature