Gravitational Radiation and the Small-Scale Structure of Cosmic Strings

Abstract

We calculate the gravitational radiation emitted by an infinite cosmic string with two oppositely moving wave-trains, in the small amplitude approximation. After comparing our result to the previously studied cases we extend the results to a new regime where the wavelengths of the opposing wave-trains are very different. We show that in this case the amount of power radiated vanishes exponentially. This means that small excitations moving in only one direction may be very long lived, and so the size of the smallest scales in a string network might be much smaller than what one would expect from gravitational back reaction. This result allows for a potential host of interesting cosmological possibilities involving ultra-high energy cosmic rays, gamma ray bursts and gravitational wave bursts.

Replaced with revised version accepted for publication by Nuclear Physics B

Cited by in corpus (43)

• Gravitational radiation from cosmic (super)strings: bursts, stochastic background, and observational windows
• Cosmological Backgrounds of Gravitational Waves and eLISA/NGO: Phase Transitions, Cosmic Strings and Other Sources
• Cosmic Strings and Superstrings
• Constraints on cosmic string tension imposed by the limit on the stochastic gravitational wave background from the European Pulsar Timing Array
• Gravitational wave bursts from cosmic (super)strings: Quantitative analysis and constraints
• Cosmic string loop distribution on all length scales and at any redshift
• Abelian Higgs Cosmic Strings: Small Scale Structure and Loops
• Cosmic String Structure at the Gravitational Radiation Scale
• Stochastic Gravitational Wave Background generated by Cosmic String Networks: Velocity-Dependent One-Scale model versus Scale-Invariant Evolution
• Cosmic String Loops, Large and Small
• Cosmic string loop shapes
• On the size of the smallest scales in cosmic string networks
• Cosmic Strings from Supersymmetric Flat Directions
• Brane necklaces and brane coils
• Scaling solution for small cosmic string loops
• String Vertex Operators and Cosmic Strings
• Gravitational Waves from an Inflation Triggered First-Order Phase Transition
• Constraining cosmic superstrings with dilaton emission
• The Stochastic Gravitational Wave Background Generated by Cosmic String Networks: the Small-Loop Regime
• Gravitational smoothing of kinks on cosmic string loops
• Non-Thermal Dark Matter from Cosmic Strings
• Monopole annihilation in cosmic necklaces
• Cosmic String Cusps with Small-Scale Structure: Their Forms and Gravitational Waveforms
• The effect of extra dimensions on gravity wave bursts from cosmic string cusps
• Gravitational Radiation by Cosmic Strings in a Junction
• Cosmic String Loops and Gravitational Radiation
• A window for cosmic strings
• Exact Wave Propagation in a Spacetime with a Cosmic String
• Gravitational Wave Bursts from Cosmic Superstring Reconnections
• Cosmic String Detection via Microlensing of Stars
• Impact of the small-scale structure on the Stochastic Background of Gravitational Waves from cosmic strings
• Correlations between cosmic strings and extra relativistic species
• Periodic Gravitational Waves From Small Cosmic String Loops
• Clustering of Superstring Loops
• Gravitational wave background from kink-kink collisions on infinite cosmic strings
• Gravitational power from cosmic string loops with many kinks
• Perturbations of Spacetime around a Stationary Rotating Cosmic String
• Covariant Vertex Operators for Cosmic Strings
• Can Superconducting Cosmic Strings Piercing Seed Black Holes Generate Supermassive Black Holes in the Early Universe?
• Analytic Approaches to the Study of Small Scale Structure on Cosmic String Networks
• Cosmological stretching of perturbations on a cosmic string
• Colliding Waves on a Brane, the Big Bounce and Reconnection
• A simple model for the evolution of a non-Abelian cosmic string network