Towards statistically homogeneous and isotropic perfect fluid universes with cosmic backreaction

摘要: A method for constructing statistically homogeneous and isotropic perfect fluid universe models with significant cosmic backreaction is proposed. The illustrated using a simplified model constructed as Swiss-cheese Lemaitre-Tolman-Bondi structures. exhibits used to study methods proposed in the literature relating volume averaged quantities observations. comparison shows poor agreement between exact redshift-distance relations predicted by schemes based on averages. Most of these deviations are, however, clearly exaggerated peculiarities example model, such large local expansion rates.