2018/02/08 by Jai Grover, Jutta Kunz, Petya Nedkova +3 · 27 citations
Physics and Astronomy · #Astrophysical Phenomena and Observations #Astrophysics #Black hole (networking) #Celestial sphere #Classical mechanics #Computer science #Experimental and Theoretical Physics Studies #Gravitation #Gravitational field #Observer (physics) #Optics #Photon #Physics #Position (finance) #Pulsars and Gravitational Waves Research #Quadrupole #Quantum mechanics #Schwarzschild metric #Schwarzschild radius #Shadow (psychology) #astro-ph.HE #gr-qc
paper · pdf · doi:10.1103/physrevd.97.084024
published in Physical review. D/Physical review. D. 97(8) (American Physical Society) · 18 pages, 14 figures
arxiv created 2018/02/08 · openalex publication_date 2018/04/16 · arxiv updated 2018/04/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study the local shadow of the Schwarzschild black hole with a quadrupole distortion and the influence of the external gravitational field on the photon dynamics. The external matter sources modify the light ring structure and lead to the appearance of multiple shadow images. In the case of negative quadrupole moments we identify the most prominent mechanism causing multiple shadow formation. Furthermore, we obtain a condition under which this mechanism can be realized. This condition depends on the quadrupole moment, but also on the position of the observer and the celestial sphere.