二次动力学Chern-Simons引力场中Kerr黑洞背景的标量扰动
Scalar perturbations on the background of Kerr black holes in the quadratic dynamical Chern-Simons gravity
摘要：
研究了动态Chern-Simons修正引力场中Kerr黑洞背景的标量扰动，其中标量场与Chern-Simons项具有二次耦合.特别地，利用双曲叶理方法，在时域内数值研究了标量扰动的晚期尾。研究发现，Kerr黑洞在参数空间的某个区域内受到线性扰动时会变得不稳定，该区域依赖于扰动模的调和方位角指数$m$.这可能表明，在这个理论中的一些克尔黑洞将自发地标度化为非克尔黑洞。
英文摘要：
We study the scalar perturbation on the background of a Kerr black hole in the dynamical Chern-Simons modified gravity with a quadratic coupling between the scalar field and Chern-Simons term. In particular, the late-time tails of scalar perturbations are investigated numerically in time domain by using the hyperboloidal foliation method. It is found that the Kerr black hole becomes unstable under linear perturbations in a certain region of the parameter space, which depends on the harmonic azimuthal index $m$ of the perturbation's mode. This may indicate that some Kerr black holes in this theory will get spontaneously scalarized into a non-Kerr black hole.
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