Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2011-02-07
Class. Quantum Grav. 28 (2011) 164002
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
32 pages, 2 figures, contribution to Classical and Quantum Gravity special issue "Inhomogeneous Cosmological Models and Averag
Scientific paper
10.1088/0264-9381/28/16/164002
Recently, inhomogeneous generalisations of the Friedmann-Lemaitre-Robertson-Walker cosmological models have gained interest in the astrophysical community and are more often employed to study cosmological phenomena. However, in many papers the inhomogeneous cosmological models are treated as an alternative to the FLRW models. In fact, they are not an alternative, but an exact perturbation of the latter, and are gradually becoming a necessity in modern cosmology. The assumption of homogeneity is just a first approximation introduced to simplify equations. So far this assumption is commonly believed to have worked well, but future and more precise observations will not be properly analysed unless inhomogeneities are taken into account. This paper reviews recent developments in the field and shows the importance of an inhomogeneous framework in the analysis of cosmological observations.
Bolejko Krzysztof
Celerier Marie-Noelle
Krasinski Andrzej
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