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Permanent link (DOI): https://doi.org/10.7939/R3367H

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Confrontation of CMB data and multiconnected models of constant positive curvature universes Open Access

Descriptions

Other title
Subject/Keyword
WMAP
Topology of the Universe
Likelihood function
Method of Images
Cosmic Microwave Background
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Knutson, Nelson P.
Supervisor and department
Pogosyan, Dmitri (Physics)
Examining committee member and department
Penin, Alexander (Physics)
Bouchard, Vincent (Mathematical and Statistical Sciences)
Frolov, Valeri (Physics)
Department
Department of Physics
Specialization

Date accepted
2013-09-24T16:40:42Z
Graduation date
2013-11
Degree
Master of Science
Degree level
Master's
Abstract
Multiconnected Universes can possibly explain the low multipole suppression observed in Cosmic Microwave Background data. We compare complete predicted correlation patterns of the temperature fluctuations in the multiconnected models with constant positive curvature to what is observed in WMAP experiment. Likelihood for three models is computed as the function of the curvature which controls the size of the multiconnected Universe relative to distance travelled by CMB photons. As curvature increases from zero for the Universe that is nearly flat and infinite, the size of the multiconnected space becomes smaller than photon horizon. There, predicted correlation patterns change from featureless to more complex. Our analysis gives no evidence for such small topological spaces. During transition likelihood curves for all three investigated spaces show similar features, attributed to the alignment of model correlation patterns to random features in the unique observed CMB realization, and not selective of a specific multiconnected space.
Language
English
DOI
doi:10.7939/R3367H
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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