论文标题
使用双重系列方法的慢慢旋转Kerr-Newman黑洞的准模式
Quasinormal modes of slowly rotating Kerr-Newman black holes using the double series method
论文作者
论文摘要
我们计算缓慢旋转的Kerr-Newman黑洞的准模式的光谱。使用扰动的双重扩展方法，旋转的二阶和非radial扰动中的一阶，我们获得了描述极性领导和轴向为扰动的方程系统。我们分析引力，电磁和标量基本模式，重点介绍$ \ mathrm {l} = 2 $扰动。我们重现了先前的结果，并检查轴向和极性扰动之间的等光谱是否与良好的精度满意。我们的结果表明，缓慢的旋转近似可用于以合理的精确度估算高达50-60美元的极端角动量的配置范围。
We calculate the spectrum of quasinormal modes of slowly rotating Kerr-Newman black holes. Using a perturbative double expansion method, second order in rotation and first order in non-radial perturbations, we obtain the system of equations that describe polar-led and axial-led perturbations. We analyse gravitational, electromagnetic and scalar fundamental modes, focusing on the $\mathrm{l}=2$ perturbations. We reproduce previous results and check that isospectrality between axial and polar-led perturbations is approximately satisfied with good accuracy. Our results show that the slow rotation approximation can be used to estimate with reasonable precision the spectrum of configurations up to 50-60$\%$ of the extremal angular momentum.
