Publication date: Dec 2007
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.
Bakala, Pavel; Čermák, Petr; Hledík, Stanislav; Stuchlík, Zdeněk; Truparová, Kamila;