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Journal Article

Large Angular Scale Anisotropy in Cosmic Microwave Background Induced by Cosmic Strings

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Allen,  Bruce
Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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prl77-3061.pdf
(Publisher version), 152KB

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Citation

Allen, B., Caldwell, R. R., Shellard, E. P. S., Stebbins, A., & Veeraraghavan, S. (1996). Large Angular Scale Anisotropy in Cosmic Microwave Background Induced by Cosmic Strings. Physical Review Letters, 77(15), 3061-3065. doi:10.1103/PhysRevLett.77.3061.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0013-5B20-C
Abstract
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.