Inhomogeneous cosmological models: exact solutions and their applications

Recently, inhomogeneous generalizations of the Friedmann-Lemaitre-Robertson-Walker (FLRW) 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...

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Bibliographic Details
Published in:Classical and quantum gravity 2011-08, Vol.28 (16), p.164002-27
Main Authors: Bolejko, Krzysztof, Célérier, Marie-Noëlle, Krasiński, Andrzej
Format: Article
Language:English
Subjects:
General Relativity and Quantum Cosmology
Physics
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Summary:Recently, inhomogeneous generalizations of the Friedmann-Lemaitre-Robertson-Walker (FLRW) 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.
ISSN:0264-9381
1361-6382
DOI:10.1088/0264-9381/28/16/164002