From spinning to non-spinning cosmic string spacetimes

TL;DR

This paper investigates the properties of spinning cosmic string spacetimes, focusing on their fluid sources, angular momentum loss via particle emission, and the transition to non-spinning configurations.

Contribution

It introduces a model of a fluid generating spinning cosmic strings with analysis of angular momentum loss and particle production during the transition to non-spinning states.

Findings

Spinning cosmic strings can spontaneously lose angular momentum through particle emission.

The rate of particle production during the transition is quantitatively calculated.

The model connects spinning and non-spinning cosmic string spacetimes via particle emission processes.

Abstract

We analyse the properties of a fluid generating a spinning cosmic string spacetime with flat limiting cases corresponding to a constant angular momentum in the infinite past and static configuration in the infinite future. The spontaneous loss of angular momentum of a spinning cosmic string due to particle emission is discussed. The rate of particle production between the spinning and non-spinning cosmic string spacetimes is calculated.