2007/01/01 by Pavel Bakala, P. Bakala, P. Cermak +7
Physics and Astronomy · #Astrophysical Phenomena and Observations #Black hole (networking) #Doppler effect #General relativity #Gravitation #Gravitational lens #Gravitational wave #Numerical relativity #Observer (physics) #Pulsars and Gravitational Waves Research #Relativity and Gravitational Theory #Schwarzschild radius #Strong gravitational lensing #astro-ph
paper · pdf · doi:10.2478/s11534-007-0033-6
openalex publication_date 2007/01/01 · arxiv created 2007/09/26 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Abstract We have developed a realistic, fully general relativistic computer code to simulate optical projection in a strong, spherically symmetric gravitational field. The standard theoretical analysis of optical projection for an observer in the vicinity of a Schwarzschild black hole is extended to black hole spacetimes with a repulsive cosmological constant, i.e, Schwarzschild-de Sitterspacetimes. Influence of the cosmological constant is investigated for static observers and observers radially free-falling from the static radius. Simulations include effects of the gravitational lensing, multiple images, Doppler and gravitational frequency shift, as well as the intensity amplification. The code generates images of the sky for the static observer and a movie simulations of the changing sky for the radially free-falling observer. Techniques of parallel programming are applied to get a high performance and a fast run of the BHC simulation code.