Greybody factor and quasinormal modes of Regular Black Holes

TL;DR

This paper studies the quasinormal modes and greybody factors of a class of regular black holes, extending previous models like Bardeen and Hayward, using semi-analytic and numerical methods.

Contribution

It introduces a detailed analysis of quasinormal frequencies for generalized regular black holes, including scalar, vector, and gravitational perturbations, with a focus on parameter dependence.

Findings

Spectrum varies with black hole parameters and quantum numbers.

Comparison with classical solutions highlights differences in quasinormal modes.

Results provide insights into black hole stability and radiation characteristics.

Abstract

In this work, we investigate the quasinormal frequencies of a class of regular black hole solutions which generalize Bardeen and Hayward spacetimes. In particular, we analyze scalar, vector and gravitational perturbations of the black hole both with the semianalytic WKB method and their time-domain profiles. We analyze in detail the behavior of the spectrum depending on the parameter $p/q$ of the black hole, the quantum number of angular momentum and the $s$ number. In addition, we compare our results with the classical solution valid for $p = q = 1$.