We consider an electromagnetic perturbation in the external space-time of a black hole with deficit angle,and describe the perturbation equation.Approximate analytic formulas for the quasi-normal frequencies have been...We consider an electromagnetic perturbation in the external space-time of a black hole with deficit angle,and describe the perturbation equation.Approximate analytic formulas for the quasi-normal frequencies have been provided,which may play a significant role in the continuing search for gravitational radiation and black hole.These frequencies can be distinguished from the ordinary quasi-normal frequencies of Schwarzschild black hole.展开更多
It is proved in this paper that under proper coordinates the Gonzalez-Diaz metric together with the Schwarzschild metric constructs the globally singularity-free metric of Schwarzschild black hole which possesses hori...It is proved in this paper that under proper coordinates the Gonzalez-Diaz metric together with the Schwarzschild metric constructs the globally singularity-free metric of Schwarzschild black hole which possesses horizon,but has no singularity.In this case the dominant energy condition is satisfied,and the results be regarded reasonable in physics.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No.19875016the Doctorial Fund from the Education Ministry of China under Grant No.1999025110.
文摘We consider an electromagnetic perturbation in the external space-time of a black hole with deficit angle,and describe the perturbation equation.Approximate analytic formulas for the quasi-normal frequencies have been provided,which may play a significant role in the continuing search for gravitational radiation and black hole.These frequencies can be distinguished from the ordinary quasi-normal frequencies of Schwarzschild black hole.
文摘It is proved in this paper that under proper coordinates the Gonzalez-Diaz metric together with the Schwarzschild metric constructs the globally singularity-free metric of Schwarzschild black hole which possesses horizon,but has no singularity.In this case the dominant energy condition is satisfied,and the results be regarded reasonable in physics.
