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ID: 403798.0, MPI für Gravitationsphysik / Observational Relativity and Cosmology
Large Angular Scale Anisotropy in Cosmic Microwave Background Induced by Cosmic Strings
Authors:Allen, Bruce; Caldwell, R. R.; Shellard, E. P. S.; Stebbins, A.; Veeraraghavan, S.
Date of Publication (YYYY-MM-DD):1996-10-07
Title of Journal:Physical Review Letters
Volume:77
Issue / Number:15
Start Page:3061
End Page:3065
Review Status:not specified
Audience:Not Specified
Abstract / Description:We simulate the anisotropy in the cosmic microwave background (CMB) induced by cosmic strings. By numerically evolving a network of cosmic strings we generate full-sky CMB temperature anisotropy maps. Based on 192 maps, we compute the anisotropy power spectrum for multipole moments ℓ≤20. By comparing with the observed temperature anisotropy, we set the normalization for the cosmic string mass per unit length μ, obtaining Gμ/c2 = 1.05-0.20+0.35×10-6, which is consistent with all other observational constraints on cosmic strings. We demonstrate that the anisotropy pattern is consistent with a Gaussian random field on large angular scales.
External Publication Status:published
Document Type:Article
Communicated by:Bruce Allen
Affiliations:MPI für Gravitationsphysik/Teilinstitut Hannover
MPI für Gravitationsphysik/Observational Relativity and Cosmology
External Affiliations:Department of Physics, University of Wisconsin–Milwaukee, P.O. Box 413, Milwaukee, Wisconsin 53201, USA
Identifiers:ISSN:1079-7114
DOI:10.1103/PhysRevLett.77.3061
URL:http://link.aps.org/doi/10.1103/PhysRevLett.77.306...
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