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arXiv 2212.08784gr-qc
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带标量毛带电黑洞的引力电磁耦合扰动与准正则模

Gravitoelectromagnetic coupled perturbations and quasinormal modes of a charged black hole with scalar hair

Wen-Di Guo, Qin Tan, Yu-Xiao Liu

AI总结:

本文研究四维带标量毛带电黑洞背景上引力场与磁场耦合扰动的准正则模,通过矩阵值直接积分方法数值求解基态频率,并分析磁荷对不同角量子数下准正则模的影响。

摘要:

从量子观点来看,奇点不应存在。最近,Bah 和 Heidmann 构造了一个五维无奇点拓扑星/黑洞 [Phys. Rev. Lett. 126, 151101 (2021)]。通过对额外维度进行积分,可以得到一个带有磁荷和标量毛的四维静态球对称黑洞。在本文中,我们研究了这个四维带标量毛带电黑洞背景上磁场和引力场的准正则模(QNMs)。引力扰动的奇宇称与磁场扰动的偶宇称相互耦合。我们得到了两个耦合的二阶导数方程。利用矩阵值直接积分方法,我们数值获得了基态准正则模频率。我们研究了磁荷对准正则模的影响。对于角量子数 $l=2$,带标量毛带电黑洞与 Reissner-Nordström 黑洞的基态准正则模频率差异非常小。然而,对于更高的角量子数,我们发现了一些新的有趣结果。

英文摘要:

From the quantum point of view, singularity should not exist. Recently, Bah and Heidmann constructed a five-dimensional singularity free topology star/black hole [Phys. Rev. Lett. 126, 151101 (2021)]. By integrating the extra dimension, a four-dimensional static spherical black hole with a magnetic charge and scalar hair can be obtained. In this paper, we study the quasinormal modes (QNMs) of the magnetic field and gravitational field on the background of this four-dimensional charged black hole with scalar hair. The odd parity of the gravitational perturbations couples with the even parity of the magnetic field perturbations. Two coupled second-order derivative equations are obtained. Using the matrix-valued direct integration method, we obtain the fundamental QNM frequencies numerically. The effect of the magnetic charge on the QNMs is studied. The differences of the frequencies of the fundamental QNMs between the charged black hole with scalar hair and the Reissner-Norström black hole are very small for the angular number $l=2$. However, some new interesting results are found for higher angular number.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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