Complex Normal-mode Frequencies of External Perturbations in Generalized Schwarzschild Geometry

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2000,（4）
• 所属期刊栏目: General
• 页码范围: 246-248
• 页数: 3页
• 语种: 英文

摘要

A moditied Wentzel-Kramers-Brillouin approach is used to determine the complex normal-mode frequencies of external perturbations in generalized Schwarzschild geometry. In the λ= 1 case (Schwarzschild geometry), the agreement with other methods is excellent for the low-lying modes. On the contrary, the λ ≠ 1 case of this geometry is unstable against external perturbations