1210.6331 (Adam Balcerzak et al.)

Redshift drift in a pressure gradient cosmology    [PDF]

Adam Balcerzak, Mariusz P. Dabrowski

We derive the redshift drift formula for the inhomogeneous pressure spherically symmetric Stephani universes which are complementary to inhomogeneous density Lema\^itre-Tolman-Bondi (LTB) models. We show that there is a clear difference between the redshift drift predictions for these two models. The Stephani models have positive drift values at small redshift and behave qualitatively as the $\Lambda$CDM models while the drift for LTB models is always negative. This prediction can be tested in future space experiments such as E-ELT, TMT, GMT or CODEX.

View original: http://arxiv.org/abs/1210.6331