Simplified Model of Voids Able to Mimic Accelerating Expansion at High z without Dark Energy

Resumo

We present a simplified model of voids in the Universe. Using this model, we investigate the effect of inhomogeneities on light propagation. We calculate the corresponding Hubble diagrams and compare them to those expected in different cosmological models. We find that voids in a universe containing only nonrelativistic matter can mimic accelerating expansion as far as Hubble diagrams are concerned.