Publication date: Sep 2008
Abstract:
We developed realistic fully general relativistic computer code for
simulation of optical projection in a strong, spherically symmetric
gravitational field. 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 (SdS) spacetimes. Influence of
the cosmological constant is investigated for static observers and
observers radially free-falling from static radius. Simulation includes
effects of gravitational lensing, multiple images, Doppler and
gravitational frequency shift, as well as the amplification of
intensity. The code generates images of static observers sky and a movie
simulations for radially free-falling observers. Techniques of parallel
programming are applied to get high performance and fast run of the
simulation code.
Authors:
Bakala, Pavel; Hledík, Stanislav; Stuchlík, Zdenĕk; Truparová, Kamila; Čermák, Petr;