Quasinormal modes of Einstein-scalar-Gauss-Bonnet black holes

被引:10
|
作者
Paul, Prosenjit [1 ]
机构
[1] Indian Inst Engn Sci & Technol IIEST, Howrah 711103, WB, India
来源
EUROPEAN PHYSICAL JOURNAL C | 2024年 / 84卷 / 03期
关键词
Electromagnetic fields - Gaussian distribution - Gravitation - Stars;
D O I
10.1140/epjc/s10052-024-12563-6
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
In this paper, we investigate quasinormal modes of scalar and electromagnetic fields in the background of Einstein-scalar-Gauss-Bonnet (EsGB) black holes. Using the scalar and electromagnetic field equations in the vicinity of the EsGB black hole, we study nature of the effective potentials. The dependence of real and imaginary parts of the fundamental quasinormal modes on parameter p (which is related to the Gauss-Bonnet coupling parameter alpha\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\alpha $$\end{document}) for different values of multipole numbers l are studied. We analyzed the effects of massive scalar fields on the EsGB black hole, which tells us the existence of quasi-resonances. In the eikonal regime, we find the analytical expression for the quasinormal frequency and show that the correspondence between the eikonal quasinormal modes and null geodesics is valid in the EsGB theory for the test fields. Finally, we study grey-body factors of the electromagnetic fields for different multipole numbers l, which deviates from Schwarzschild's black hole.
引用
收藏
页数:30
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