Gravitational Radiation by Cosmic Strings in a Junction

TL;DR

This paper develops a formalism to calculate gravitational radiation emitted by excitations on cosmic strings at junctions, analyzing effects of polarization and back-reaction on string structure.

Contribution

It introduces a new formalism for computing gravitational radiation from cosmic string junctions, including polarization effects and back-reaction considerations.

Findings

Derived expressions for gravitational power radiation from string excitations.

Analyzed the impact of polarization on radiation emission.

Studied back-reaction effects on small-scale string structure.

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.