Quasinormal modes of black holes have been one of the main topics of relativistic astrophysics for the last few decades.
黑洞的似正规模在过去的几十年里已经成为相对论天体物理学研究的主题之一。
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The frequencies and damping time of the quasinormal oscillations called "quasinormal mode" (QNM) are determined only by the black hole's parameters and independent of the initial perturbations.