标题： 接近极端Reissner-Nordström-去心时空的准正则模式 显示英文标题

标题： Quasinormal modes of near-extremal Reissner-Nordström-de Sitter spacetimes

摘要： 我们研究了Klein-Gordon方程在接近极端电荷的Reissner-Nordström-de Sitter黑洞上的准正模（QNM）。我们定位了大小为$\mathcal{O}(\kappa_{\rm C})$的所有准正模，其中$\kappa_{\rm C}$是视界的表面引力（在极端情况下消失）：它们可以很好地由近极限极值几何${\rm AdS}^2\times{\mathbb S}^2$的准正模$\kappa_{\rm C}$倍来近似。 显示英文摘要

摘要： We study quasinormal modes (QNMs) for the Klein-Gordon equation on Reissner-Nordstr\"om-de Sitter black holes with near-extremal charge. We locate all QNMs of size $\mathcal{O}(\kappa_{\rm C})$ where $\kappa_{\rm C}$ is the surface gravity of the Cauchy horizon (which vanishes at extremality): they are well-approximated by $\kappa_{\rm C}$ times QNMs of the near-horizon geometry ${\rm AdS}^2\times{\mathbb S}^2$ of the extremal limit.