Instability of regularized 4D charged Einstein-Gauss-Bonnet de-Sitter black holes

作     者：刘鹏 牛超 张承勇 Peng Liu;Chao Niu;Cheng-Yong Zhang

作者机构：Department of Physics and Siyuan LaboratoryJinan UniversityGuangzhou 510632China 

出 版 物：《Chinese Physics C》 (中国物理C（英文版）)

年 卷 期：2021年第45卷第2期

页      面：568-577页

核心收录：

学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学] 0702[理学-物理学] 

基　　金：Supported by the National Natural Science Foundation of China(11847055 11905083 11805083 11947067)。 

主　　题：black hole Einstein-Gauss-Bonnet instability 

摘      要：We studied the instability of regularized 4D charged Einstein-Gauss-Bonnet de-Sitter black holes under charged scalar perturbations.The unstable modes satisfy the superradiant condition,but not all of the modes satisfying the superradiant condition are unstable.The instability occurs when the cosmological constant is small and the black hole charge is not too large.The Gauss-Bonnet coupling constant further destabilizes black holes when both the black hole charge and the cosmological constant are small and further stabilizes black holes when the black hole charge is large.