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Superradiance and stability of Kerr black hole enclosed by anisotropic fluid matter
Physics Letters B ( IF 4.3 ) Pub Date : 2021-11-08 , DOI: 10.1016/j.physletb.2021.136775
Mohsen Khodadi 1 , Reza Pourkhodabakhshi 2
Affiliation  

Focusing on the rotating black hole (BH) surrounded by the anisotropic fluid matters; radiation, dust, and dark matter, we study the massive scalar superradiant scattering and the stability in the Kiselev spacetime. Superradiance behavior is dependent on the intensity parameter of the anisotropic matter K in the Kiselev spacetime. By adopting the manifest of low-frequency and low-mass for the scalar perturbation, we find K<0 enhances the superradiance scattering within the broader frequency range, compared to K=0 while K>0 suppresses within the narrower frequency range. As a result, the radiation and dark matter around the rotating BH act as amplifier and attenuator for the massive scalar superradiance, respectively. This is while the dust has a twofold role because of admitting both signs of K. Through stability analysis in the light of the BH bomb mechanism, we show in the presence of dark matter, the instability regime of standard Kerr BH (K=0) gets improved in favor of stabilization while the radiation and dust do not affect it. In other words, by taking the dark matter fluid around BH into account, we obtain a broader regime that allows the massive scalar field dynamic to enjoy superradiant stability.



中文翻译:

被各向异性流体物质包围的克尔黑洞的超辐射和稳定性

关注被各向异性流体物质包围的旋转黑洞(BH);辐射、尘埃和暗物质,我们研究了基谢廖夫时空的大量标量超辐射散射和稳定性。超辐射行为取决于基谢廖夫时空中各向异性物质K的强度参数。通过对标量摄动采用低频和低质量的表现,我们发现<0 增强了更宽频率范围内的超辐射散射,相比之下 =0 尽管 >0在较窄的频率范围内进行抑制。结果,旋转 BH 周围的辐射和暗物质分别充当了大量标量超辐射的放大器和衰减器。这是因为灰尘具有双重作用,因为承认K 的两个迹象。通过 BH 炸弹机制的稳定性分析,我们展示了在暗物质存在的情况下,标准 Kerr BH (=0) 得到改进,有利于稳定,而辐射和灰尘不影响它。换句话说,通过考虑 BH 周围的暗物质流体,我们获得了一个更广泛的机制,允许大规模标量场动力学享受超辐射稳定性。

更新日期:2021-11-12
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