Large-scale structure from cosmic string loops. I - Formation and linear evolution of perturbations

Details Large-scale structure from cosmic string loops. I - Formation and linear evolution of perturbations Large-scale structure from cosmic string loops. I - Formation and linear evolution of perturbations

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...320....1s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 320, Sept. 1, 1987, p. 1-12. Research supported by the McCormick Foundation

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Computation

18

Astronomical Models, Cosmology, Galactic Evolution, Linear Evolution Equations, Loops, Perturbation Theory, Computational Astrophysics, Domains, Early Stars, Gauge Theory, Power Spectra, Universe

Scientific paper

A numerical model for the formation of large-scale structure from cosmic string loops is presented. The configuration of cosmic strings at the end of the epoch of equal matter and radiation is discussed, giving a numerical model for this configuration. A model is presented for the linear evolution of the perturbations induced by these loops, and the perturbation spectrum which exists before the perturbations go nonlinear is analyzed. The model produces a non-Gaussian fluctuation spectrum with nonrandom phases. The power at large scales is suppressed by the loop perturbations being isocurvature fluctuations. There are no long-range Brownian correlations between loops which fragment from the same infinite string. These factors inhibit the formation of structure on large scales.

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