Quasinormal oscillations and late-time tail of massless scalar perturbations of a magnetized black hole in Rastall gravity  

作　　者：Cai-Ying Shao Yu-Jie Tan Cheng-Gang Shao Kai Lin Wei-Liang Qian 邵才莹;谈玉杰;邵成刚;林恺;钱卫良(MOE Key Laboratory of Fundamental Physical Quantities Measurement,Hubei Key Laboratory of Gravitation and Quantum Physics,PGMF,and School of Physics,Huazhong University of Science and Technology,430074 Wuhan,China;Hubei Subsurface Multi-scale Imaging Key Laboratory,Institute of Geophysics and Geomatics,China University of Geosciences,430074 Wuhan,China;Escola de Engenharia de Lorena,Universidade de Sao Paulo,12602-810,Lorena,SP,Brazil;Faculdade de Engenharia de Guaratinguetá,Universidade Estadual Paulista,12516-410,Guaratinguetá,SP,Brazil and;Center for Gravitation and Cosmology,School of Physical Science and Technology,Yangzhou University,225002 Yangzhou,China)

机构地区：[1]MOE Key Laboratory of Fundamental Physical Quantities Measurement,Hubei Key Laboratory of Gravitation and Quantum Physics,PGMF,and School of Physics,Huazhong University of Science and Technology,430074 Wuhan,China [2]Hubei Subsurface Multi-scale Imaging Key Laboratory,Institute of Geophysics and Geomatics,China University of Geosciences,430074 Wuhan,China [3]Escola de Engenharia de Lorena,Universidade de Sao Paulo,12602-810,Lorena,SP,Brazil [4]Faculdade de Engenharia de Guaratinguetá,Universidade Estadual Paulista,12516-410,Guaratinguetá,SP,Brazil and [5]Center for Gravitation and Cosmology,School of Physical Science and Technology,Yangzhou University,225002 Yangzhou,China

出　　处：《Chinese Physics C》2022年第10期215-229,共15页中国物理C（英文版）

基　　金：Supported by the National Natural Science Foundation of China(NNSFC)(11805166,11925503,12175076);the financial support from Fundacao de Amparo a Pesquisa do Estado de Sao Paulo(FAPESP);Fundacao de Amparo a Pesquisa do Estado do Rio de Janeiro(FAPERJ);Conselho Nacional de Desenvolvimento Científico e Tecnológico(CNPq);Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior(CAPES);the project Institutos Nacionais de Ciencias e Tecnologia-Fisica Nuclear e Aplicacoes(INCT/FNA)Proc.No.464898/2014-5;supported by the Center for Scientific Computing(NCC/Grid UNESP)of the Sao Paulo State University(UNESP)。

摘　　要：In this study,we investigate the quasinormal mode and late-time tail of charged massless scalar perturbations of a black hole in generalized Rastall gravity.The black hole metric in question is spherically symmetric,accompanied by a power-Maxwell field surrounded by a quintessence fluid.We show that the massless scalar field,when dressed up with the magnetic field,acquires an effective mass,which significantly affects the properties of the resultant quasinormal oscillations and late-time tails.Specifically,the quasinormal frequencies become distorted and might even be unstable for particular spacetime configurations.Additionally,the exponent of the usual power-law tail is modified according to the modification in the structure of the branch cut of the retarded Green s function.In particular,as the effective mass is generated dynamically owing to the presence of the magnetic field,we may consider a process through which the field is gradually removed from the spacetime configuration.In this context,while the quasinormal oscillations converge to the case of massless perturbations,we argue that the properties of resultant late-time tails do not fall back to their massless counterpart.The relevant characteristics are investigated using numerical and analytic approaches.

关 键 词：black hole quasinormal modes late-time tail Rastall gravity 

分 类 号：P145.8[天文地球—天体物理] O412.1[天文地球—天文学]