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

• 来源期刊: 中国物理C（英文版）
• 年，卷（期）: 2021,（2）
• 所属期刊栏目: PARTICLE AND NUCLEAR ASTROPHYSICS AND COSMOLOGY
• 页码范围: 568-577
• 页数: 10页
• 语种: 英文
• DOI: 10.1088/1674-1137/abcd2d

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 satisfy-ing 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.