Cosmic Superstring Gravitational Lensing Phenomena: Predictions for Networks of (p,q) Strings

TL;DR

This paper explores the unique gravitational lensing effects caused by cosmic string networks, especially those with junctions, providing predictions that could confirm complex string theory models.

Contribution

It offers exact solutions to characterize lensing phenomena in networks of (p,q) cosmic strings with junctions, correcting previous misconceptions.

Findings

Distinctive lensing patterns from string junctions identified

Predictions support detection of complex cosmic string networks

Corrections made to previous lensing phenomenology of straight strings

Abstract

The unique, conical spacetime created by cosmic strings brings about distinctive gravitational lensing phenomena. The variety of these distinctive phenomena is increased when the strings have non-trivial mutual interactions. In particular, when strings bind and create junctions, rather than intercommute, the resulting configurations can lead to novel gravitational lensing patterns. In this brief note, we use exact solutions to characterize these phenomena, the detection of which would be strong evidence for the existence of complex cosmic string networks of the kind predicted by string theory-motivated cosmic string models. We also correct some common errors in the lensing phenomenology of straight cosmic strings.