论文标题
改性重力中黑洞扰动的新外观
A new look on black hole perturbations in modified gravity
论文作者
论文摘要
我们使用一种系统的方法研究了关于Horndeski理论的非旋转黑洞解决方案的线性扰动，该方法直接从一阶径向差异系统中提取了扰动的渐近行为（在空间无穷大和地平线附近），而不是找到这些扰动，而不是找到Schrödinger类似于其动力学的方程。在特定的黑洞溶液的情况下，我们说明了这种方法。扰动的渐近行为的知识为准模式的数值计算铺平了道路。最后，模式的渐近形式还标志着此处考虑的解决方案标量扇形中的一些病理。
We study the linear perturbations about a nonrotating black hole solution of Horndeski's theory, using a systematic approach that extracts the asymptotic behaviour of perturbations (at spatial infinity and near the horizon) directly from the first-order radial differential system governing these perturbations instead of finding Schrödinger-like equations for their dynamics. We illustrate this method in the case of a specific black hole solution. The knowledge of the asymptotic behaviours of the perturbations paves the way for a numerical computation of the quasinormal modes. Finally, the asymptotic form of the modes also signals some pathologies in the scalar sector of the solution considered here.
