Cosmic String Loops and Gravitational Radiation

Abstract

Understanding of the signatures of cosmic string networks is limited by a large uncertainty in the sizes at which cosmic string loops form. We review cosmic string network evolution, and the gravitational signatures, with emphasis on this uncertainty. We then review a recent analytic model of cosmic string networks. In combination with recent simulations, this suggests that 90% of the string goes into very small loops, at the gravitational radiation scale, and 10% into loops near the Hubble scale. We discuss cosmic string signatures in such a scenario, and the `inverse problem' of determining the microscopic cosmic string properties from observations.

26 pages, to appear in the Proceedings of the 11th Marcel Grossman meeting. v2: Additional paragraph about uncertainties in bounds (sec. 5.2)

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Cited by in corpus (16)

• Cosmic Strings and Superstrings
• Detecting Cosmic Strings in the CMB with the Canny Algorithm
• Canny Algorithm, Cosmic Strings and the Cosmic Microwave Background
• Update of D3/D7-Brane Inflation on K3 x T^2/Z_2
• Cosmic Strings as the Source of Small-Scale Microwave Background Anisotropy
• Cosmic string loops: large and small, but not tiny
• Magnetogenesis from Cosmic String Loops
• Cosmic String Detection via Microlensing of Stars
• Energy Radiation by Cosmic Superstrings in Brane Inflation
• Impact of the small-scale structure on the Stochastic Background of Gravitational Waves from cosmic strings
• Detection of Low Tension Cosmic Superstrings
• Cosmic strings in a space-time with positive cosmological constant
• Clustering of Superstring Loops
• Towards an Observational Appraisal of String Cosmology
• Periodic Fast Radio Bursts from Axion Emission by Cosmic Superstrings
• Analytic Approaches to the Study of Small Scale Structure on Cosmic String Networks