Gravitational Radiation by Cosmic Strings in a Junction

Abstract

The formalism for computing the gravitational power radiation from excitations on cosmic strings forming a junction is presented and applied to the simple case of co-planar strings at a junction when the excitations are generated along one string leg. The effects of polarization of the excitations and of the back-reaction of the gravitational radiation on the small scale structure of the strings are studied.

minor changes added, the published version in JCAP

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• Gravitational Wave Bursts from Cosmic Superstring Reconnections
• Gravitational Wave Bursts from Cosmic String Cusps and Pseudocusps
• Zipping and Unzipping of Cosmic String Loops in Collision
• Vacuum energy in conical space with additional boundary conditions
• Induced vacuum current and magnetic field in the background of a vortex
• Cusps and pseudo-cusps in strings with Y-junctions
• Cosmic superstring trajectories in warped compactifications
• Theoretical constraints on brane inflation and cosmic superstring radiation
• Induced vacuum current and magnetic flux in quantum scalar matter in the background of a vortex defect with the Neumann boundary condition
• Cosmic Strings Collision in Cosmological Backgrounds