Quasinormal Modes of Bardeen Black Hole: Scalar Perturbations

TL;DR

This paper investigates the quasinormal modes of Bardeen black holes under scalar perturbations, analyzing how parameters like charge, mass, and field mass affect the frequencies, and compares results with Reissner-Nordstrom black holes.

Contribution

It provides a comprehensive analysis of scalar QNM frequencies of Bardeen black holes, including the effects of charge, mass, and spherical harmonic index, and compares with Reissner-Nordstrom black holes.

Findings

QNM frequencies vary with charge, mass, and harmonic index.

Unstable null geodesics are used to compute QNMs in the eikonal limit.

Massive scalar fields influence the QNM spectrum.

Abstract

The purpose of this paper is to study quasinormal modes (QNM) of the Bardeen black hole due to scalar perturbations. We have done a thorough analysis of the QNM frequencies by varying the charge $q$, mass $M$ and the spherical harmonic index $l$. The unstable null geodesics are used to compute the QNM's in the eikonal limit. Furthermore, massive scalar field modes are also studied by varying the mass of the field. Comparisons are done with the QNM frequencies of the Reissner-Nordstrom black hole.