Observational Tests of FRW World Models

Details Observational Tests of FRW World Models Observational Tests of FRW World Models

2001-12-21

arxiv.org/abs/astro-ph/0112524v1

Class.Quant.Grav.19:3517-3526,2002

Astronomy and Astrophysics

Astrophysics

11 pages with 3 figures included. Invited review at ``The Early Universe and Cosmological Observations: a Critical Review'', U

Scientific paper

10.1088/0264-9381/19/13/309

Observational tests for the Cosmological Principle are reviewed. Assuming the FRW metric we then summarize estimates of cosmological parameters from various data sets, in particular the Cosmic Microwave Background and the 2dF galaxy redshift survey. These and other analyses suggest a best-fit Lambda-Cold Dark Matter model with Omega_m = 1 - Omega_lambda = 0.3 and H_0 = 70 km/sec/Mpc. It is remarkable that different measurements converge to this `concordance model', although it remains to be seen if the two main components of this model, the dark matter and the dark energy, are real entities or just `epicycles'. We point out some open questions related to this fashionable model.

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