The Stochastic Gravitational Wave Background Generated by Cosmic String Networks: the Small-Loop Regime

Abstract

We consider an alternative approach for the computation of the stochastic gravitational wave background generated by small loops produced throughout the cosmological evolution of cosmic string networks and use it to derive an analytical approximation to the corresponding power spectrum. We show that this approximation produces an excellent fit to more elaborate results obtained using the Velocity-dependent One-Scale model to describe cosmic string network dynamics, over a wide frequency range, in the small-loop regime.

6 pages, 2 figures

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• Probing the gravitational wave background from cosmic strings with LISA
• Full analytical approximation to the stochastic gravitational wave background generated by cosmic string networks
• Probing Cosmic Superstrings with Gravitational Waves
• Irreducible background of gravitational waves from a cosmic defect network: update and comparison of numerical techniques
• Signature of inflation in the stochastic gravitational wave background generated by cosmic string networks
• Ultrahigh frequency primordial gravitational waves beyond the kHz: The case of cosmic strings
• Emission of gravitational waves by superconducting cosmic strings
• Observational Constraints on Varying-alpha Domain Walls
• CMB anisotropies generated by cosmic string loops
• Thermodynamics of Cosmic Defect Network Evolution
• Dynamical simulations of colliding superconducting strings
• Spectrum of radiation from global strings and the relic axion density