Structure of test magnetic fields and charged particle motion around the Hayward spacetime

TL;DR

This paper investigates the structure of test magnetic fields and the dynamics of charged particles around Hayward spacetime, revealing dipole magnetic configurations and analyzing orbital stability.

Contribution

It provides a detailed analysis of magnetic field configurations and charged particle motion in Hayward spacetime, a regular black hole model, which was not extensively studied before.

Findings

Magnetic field lines form a dipole loop in the Hayward interior.

Charged particle orbits exhibit specific stability properties.

Non-equatorial motions are characterized in this spacetime.

Abstract

A configuration of a test magnetic field in Hayward spacetime is obtained by solving Maxwell's equation with the Hayward metric as the background. The magnetic field lines show a dipole loop-like configuration in the regular Hayward interior, and tends to an asymptotically uniform structure away from the cylindrical axis. The motion of charged particles is then studied in this spacetime. The parameters and stability of circular orbits on the equatorial plane are studied. Aspects of non-equatorial motion are also studied.