Magnetic Field of Cosmic Strings in the Early Universe

TL;DR

This paper investigates the generation of magnetic fields around cosmic strings in the early Universe, focusing on their interactions with pseudoscalar matter and cosmic plasma at GUT energy scales.

Contribution

It introduces a model for magnetic field generation around cosmic strings involving pseudoscalar matter and analyzes their interaction with cosmic plasma.

Findings

Circular currents and magnetic fields are induced around cosmic strings.

Cosmic plasma can become magnetized through interaction with string magnetic fields.

Magnetic flux tubes around strings influence early Universe magnetic phenomena.

Abstract

Cosmic strings are topological defects which can be formed as a result of phase transitions with a spontaneous symmetry breaking in the early Universe. The possibility of the generation of a magnetic field around a cosmic string on the Grand Unification energy scale (GUT scale) in the early Universe immediately after the termination of the deconfinement-confinement phase transition has been analyzed. It is found that a circular current and a magnetic field directed along the string are induced around the string in the vacuum of a pseudoscalar matter consisting of charged pions. We also have studied the interaction between the magnetic flux tube surrounding the string (the string magnetosphere) and the cosmic plasma in the early Universe. A possibility of magnetization of the cosmic plasma surrounding the string owing to its interaction with the string magnetic field has been analyzed.