Quasinormal modes of slowly rotating Kerr-Newman black holes using the double series method

被引:4
作者
Blazquez-Salcedo, Jose Luis [1 ,2 ]
Khoo, Fech Scen [3 ]
机构
[1] Univ Complutense Madrid, Fac Ciencias Fis, Dept Fis Teor, Madrid 28040, Spain
[2] Univ Complutense Madrid, Fac Ciencias Fis, IPARCOS, Madrid 28040, Spain
[3] Carl von Ossietzky Univ Oldenburg, Inst Phys, D-26111 Oldenburg, Germany
关键词
D O I
10.1103/PhysRevD.107.084031
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We calculate the spectrum of quasinormal modes of slowly rotating Kerr-Newman black holes. Using a perturbative double expansion method, second order in rotation and first order in nonradial perturbations, we obtain the system of equations that describe polar-led and axial-led perturbations. We analyze gravitational, electromagnetic and scalar fundamental modes, focusing on the l 1/4 2 perturbations. We reproduce previous results and check that isospectrality between axial and polar-led perturbations is approximately satisfied with good accuracy. Our results show that the slow rotation approximation can be used to estimate with reasonable precision the spectrum of configurations up to 50%-60% of the extremal angular momentum.
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页数:22
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