Massive scalar field perturbations in noncommutative-geometry-inspired Schwarzschild black hole

TL;DR

This study analyzes quasinormal modes, greybody factors, and absorption cross sections of a noncommutative Schwarzschild black hole under massive scalar perturbations, revealing stability and parameter effects.

Contribution

It introduces a third-order WKB method to systematically compute perturbation characteristics in a noncommutative black hole, highlighting the influence of noncommutative parameters and mass.

Findings

QNFs satisfy Im(ω)<0, confirming stability.

Increasing noncommutative parameter θ decreases frequency magnitude.

Increasing mass μ increases real part and decreases imaginary part of QNFs.

Abstract

In this paper, based on noncommutative-geometry-inspired Schwarzschild black hole, we employ a third-order WKB approximation approach to systematically calculate the quasinormal mode frequencies (QNFs), greybody factors (GFs), and absorption cross section (ACS) under massive scalar field perturbations. The results show that the QNFs satisfy Im($\omega$)<0, confirming the stability of the black hole under perturbations. Furthermore, increasing the noncommutative parameter $\theta$ reduces the absolute values of both the real and imaginary parts of the frequency, while increasing mass $\mu$ increases the real part and reduces the imaginary part. The GFs and ACS increase with increasing $\theta$ and decrease with increasing $\mu$, indicating opposite modulation effects of these two types of parameters. It is worth emphasizing that the QNFs of the extreme black hole approach the corresponding values of the classical Schwarzschild black hole at angular quantum number $\ell=1$ and large $\mu$, suggesting that, the effects of mass and noncommutative geometry quantum corrections cancel each other out to some extent. It is hoped that these results provide a viable theoretical basis for both the theoretical and experimental aspects of the perturbative dynamics of black hole.