Quasinormal Modes of a black hole surrounded by a fluid of strings in Rastall gravity

TL;DR

This paper investigates how the quasinormal modes of a black hole are affected by surrounding string fluids and Rastall gravity, analyzing scalar, electromagnetic, and gravitational perturbations with numerical results highlighting parameter influences.

Contribution

It introduces the study of QNMs for black holes in Rastall gravity with a surrounding fluid of strings, focusing on parameter effects across different perturbation types.

Findings

QNMs depend significantly on the parameter ε.

Black hole charge Q and angular momentum l influence QNM frequencies.

Results are consistent across scalar, electromagnetic, and gravitational perturbations.

Abstract

In this paper, we explore the quasinormal modes (QNMs) of a black hole surrounded by a fluid of strings within the framework of Rastall gravity. We analyze the behavior of scalar, electromagnetic, and gravitational perturbations, focusing on the influence of the black hole charge $Q$ and angular momentum $l$ on the quasinormal frequencies. Our numerical results reveal a significant dependence on the parameter $\varepsilon$. These trends are consistent across different types of perturbations, emphasizing the relationship between black hole parameters and QNMs behavior.