Gravitational Field of a Spinning Cosmic String

TL;DR

This paper investigates how internal space rotation affects the gravitational properties of spinning cosmic strings, deriving approximate solutions that reveal effects like frame dragging and light deflection, with implications for galaxy formation.

Contribution

It provides an approximate solution to Einstein's equations for spinning cosmic strings, analyzing their gravitational effects including frame dragging and light deflection.

Findings

Long-range gravitational acceleration similar to rotating cylindrical shells

Computed angular velocity of frame dragging

Estimated matter accretion effects relevant to galaxy formation

Abstract

We study the effect of internal space rotation on the gravitational properties of infinite straight and stationary cosmic string. From the approximate solution of Einsten equations for the spinning Q-lump string we obtain long range gravitational accelleration resembling that of a rotating massive cylindrical shell. We also compute the angular velocity of the inertial frame dragging and the angle of light deflection by the Q-lump string. Matter accretion on to spinning strings can play a role in galaxy formation when the angular velocity times the string width is comparable to the speed of light.