Chern-Simons black holes: scalar perturbations, mass and area spectrum and greybody factors

TL;DR

This paper analytically investigates Chern-Simons black holes in various dimensions, focusing on scalar perturbations, their spectra, and greybody factors, revealing dependence on curvature, topology, and frequency.

Contribution

It provides the first analytical calculation of quasi-normal modes, mass and area spectra, and greybody factors for Chern-Simons black holes, highlighting their dependence on curvature and topology.

Findings

Quasi-normal modes depend on the highest curvature power.

Mass and area spectra are not evenly spaced and depend on topology.

At low frequencies, certain modes significantly contribute to absorption cross section.

Abstract

We study the Chern-Simons black holes in d-dimensions and we calculate analytically the quasi-normal modes of the scalar perturbations and we show that they depend on the highest power of curvature present in the Chern-Simons theory. We obtain the mass and area spectrum of these black holes and we show that they have a strong dependence on the topology of the transverse space and they are not evenly spaced. We also calculate analytically the reflection and transmission coefficients and the absorption cross section and we show that at low frequency limit there is a range of modes which contributes to the absorption cross section.