Solution for a local straight cosmic string in the braneworld gravity

TL;DR

This paper investigates the properties of straight cosmic strings within braneworld gravity, revealing modifications in their gravitational effects and constraints on braneworld tension compared to general relativity.

Contribution

It provides a detailed analysis of how cosmic string features differ in braneworld gravity, including changes in linear density, deficit angle, and tension restrictions.

Findings

Cosmic strings in braneworld gravity have altered linear density and deficit angles.

A lower bound on braneworld tension is established at $oxed{3 imes 10^{-17}}$ in Planck units.

Significant deviations from general relativity predictions are identified.

Abstract

In this work we deal with the spacetime shaped by a straight cosmic string, emerging from local gauge theories, in the braneworld gravity context. We search for physical consequences of string features due to the modified gravitational scenario encoded in the projected gravitational equations. It is shown that cosmic strings in braneworld gravity may present significant differences when compared to the general relativity predictions since its linear density is modified and the deficit angle produced by the cosmic string is attenuated. Furthermore, the existence of cosmic strings in that scenario requires a strong restriction to the braneworld tension: $\lambda \geq 3 \times 10^{-17}$, in Planck units.