Object Picture of Quasinormal Modes for Stringy Black Holes

TL;DR

This paper investigates the quasinormal modes of stringy black holes across different dimensions, revealing how their frequencies depend on parameters like mass, charge, and horizon size through numerical analysis.

Contribution

It provides a detailed numerical analysis of QNMs for stringy black holes in (1+1) and (1+3) dimensions, highlighting parameter dependencies not previously characterized.

Findings

Real part of QNM frequency increases with black hole mass in (1+1) dimensions.

Imaginary part of QNM frequency decreases as black hole mass increases in (1+1) dimensions.

In (1+3) dimensions, the real part of QNM frequency decreases with larger event horizon or multipole index.

Abstract

We study the quasinormal modes (QNMs) for stringy black holes. By using numerical calculation, the relations between the QNMs and the parameters of black holes are minutely shown. For (1+1)-dimensional stringy black hole, the real part of the quasinormal frequency increases and the imaginary part of the quasinormal frequency decreases as the mass of the black hole increases. Furthermore, the dependence of the QNMs on the charge of the black hole and the flatness parameter is also illustrated. For (1+3)-dimensional stringy black hole, increasing either the event horizon or the multipole index, the real part of the quasinormal frequency decreases. The imaginary part of the quasinormal frequency increases no matter whether the event horizon is increased or the multipole index is decreased.