1996/09/05 by B. Allen, Robert R. Caldwell, R. R. Caldwell +4 · 3 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Radio Astronomy Observations and Technology #astro-ph #gr-qc
paper · pdf · doi:10.1103/physrevlett.77.3061
published as Phys.Rev.Lett.77:3061-3065,1996 · 4 pages, RevTeX, two postscript files, also available at http://www.damtp.cam.ac.uk/user/defects/ to appear in Physical Review Letters, 23 September 1996
arxiv created 1996/09/05 · openalex publication_date 1996/10/07 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
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 \ensuremathℓ\ensuremath≤20. By comparing with the observed temperature anisotropy, we set the normalization for the cosmic string mass per unit length \ensuremathμ, obtaining G\ensuremathμ/c2\phantom\rule0ex0ex=\phantom\rule0ex0ex1.05_\ensuremath-0.20+0.35\ifmmode×\else\texttimes\fi10^\ensuremath-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.