Publication date: Dec 2006
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 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, P.; Cermak, P.; Hledik, S.; Stuchlik, Z.; Truparova, K.;