Scalar Perturbations of Regular Black Holes derived from a Non-Singular Collapse Model in Asymptotic Safety

TL;DR

This paper studies scalar field perturbations and quasinormal modes of regular black holes from a non-singular collapse model in Asymptotic Safety, analyzing stability and potential observational signatures.

Contribution

It introduces a new class of asymptotically safe black holes from a non-singular collapse model and analyzes their stability and quasinormal mode spectrum.

Findings

The black holes are stable under scalar perturbations.

High-order overtones may reveal horizon structure signatures.

The quasinormal mode spectrum differs from classical black holes.

Abstract

We investigate the massless scalar field perturbations, focusing on the quasinormal modes spectrum and the ringdown waveform of regular black hole spacetimes derived within the Asymptotic Safety program. In particular, we discuss the stability of a new class of AS black holes recently derived dynamically within a non-singular model of collapse and explore the possibility of detecting signatures of the horizon structure with high-order overtones.