0 Ja n 20 08 Structure Formation , Backreaction and Weak Gravitational Fields

There is an ongoing debate in the literature as to whether the effects of averaging out inhomogeneities (“backreaction”) in Cosmology can be large enough to account for the acceleration of the scale factor in the FLRW models. In particular, some simple models of structure formation studied in the literature seem to indicate that this is indeed possible, and… (More)