Cosmological parameter dependence in local string theories of structure formation

Abstract

We perform a new and accurate study of the dependence on cosmological parameters of structure formation with local cosmic strings. The crucial new ingredients are the inclusion of the effects of gravitational backreaction on the evolution of the network, and the accurate evolution of the network through the radiation to matter transition. Our work re-iterates the fact that expanding Universe numerical simulations only probe a transient regime, and we incorporate our results into the unequal time correlators recently measured. We then compute the CMB and CDM fluctuations' power spectra for various values of the Hubble constant $H_0$ and baryon fraction ${\Omega }_b$. We find that, whereas the dependence on ${\Omega }_b$ is negligible, there is still a strong dependence on $H_0$.

LaTex, 7 pages, 5 figures - one new. This version will appear in PRD

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• Numerical simulations of string networks in the Abelian-Higgs model
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Cited by in corpus (10)

• Probing the gravitational wave background from cosmic strings with LISA
• Observational Constraints on Cosmic String Production During Brane Inflation
• CMB power spectrum contribution from cosmic strings using field-evolution simulations of the Abelian Higgs model
• Bounds on Cosmic Strings from WMAP and SDSS
• CMB constraints on cosmic strings and superstrings
• B-modes from Cosmic Strings
• Cosmic String from D-term Inflation and Curvaton
• Cosmic Microwave Background anisotropies generated by domain wall networks
• Self-intersections and gravitational properties of chiral cosmic strings in Minkowski space
• Gravitational wave background from kink-kink collisions on infinite cosmic strings