Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-09-26
Astronomy and Astrophysics
Astrophysics
Scientific paper
10.2478/s11534-007-0033-6
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 Sitter spacetimes. 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.
Bakala Pavel
Cermak Petr
Hledik Stanislav
Stuchlik Zdenek
Truparova Kamila
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