May 17, 10:15 in E204 (Tuesday Seminar)   

Sebastian Szybka (Jagellonian University, Cracow, Poland)


Angular diameter distance in Swiss-Cheese models

I will present numerical results concerning the effect of inhomogeneities on light propagation in Swiss-Cheese models. In the models I have studied, inhomogeneities may partially mimic the accelerated expansion of the Universe provided that light propagates through regions with lower than the average density. The effect of inhomogeneities is small and full randomization of the photons' trajectories reduces it to an insignificant level.