Perceiving light rays above and below the horizon of a black hole in Schwarzschild spacetime

3rd International Conference on Mathematical Modeling in Physical Sciences

物理学;数学

Siwek, A.^1 ; Kusmierz, B.^1,2 ; Gusin, P.^3 ; Masajada, J.^1 ; Radosz, A.^1

Institute of Physics, Wroclaw University of Technology, Wybrzee Wyspiaskiego 27, Wroclaw

50-370, Poland^1

Institute of Mathematics, University of Wroclaw, Plac Grunwaldzki 2/4, Wroclaw

50-384, Poland^2

Institute of Theoretical Physics, University of Wroclaw, Plac Maxa Borna 9, Wroclaw

50-204, Poland^3

关键词: Black holes;    Different class;    Light rays;    Phase portrait;    Schwarzschild;    Spacetime;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/574/1/012060/pdf
DOI  :  10.1088/1742-6596/574/1/012060

来源: IOP

【 摘 要 】

We consider a novel kind of plot for presenting the behaviour of null geodesics in Schwarzschild spacetime. Our diagram depicts various features of the light rays as recorded by different classes of observers. The idea stems from the use of phase portraits for illustrating the null geodesics in Schwarzschild spacetime, above and below the horizon of a black hole, but they reveal unphysical characteristics. The plots we propose are free from such anomalies. Moreover they allow us to discover new under-horizon features.