Light propagation through large-scale inhomogeneities in the Universe and its impact on cosmological observations

Details Light propagation through large-scale inhomogeneities in the Universe and its impact on cosmological observations Light propagation through large-scale inhomogeneities in the Universe and its impact on cosmological observations

2008-04-11

arxiv.org/abs/0804.1826v1

Astronomy and Astrophysics

Astrophysics

4 pages, to appear in the proceedings of the "Encuentros Relativistas Espanoles - Spanish Relativity Meeting ERE07"

Scientific paper

10.1051/eas:0830059

This paper analyses cosmological observations within inhomogeneous and exact solutions of the Einstein equations. In some way the analyses presented here can be freed from assumptions such as small amplitude of the density contrast. The supernova observations are analysed using the Lema\itre-Tolman model and the CMB observations are analysed using the quasispherical Szekeres model. The results show that it is possible to fit the supernova data without the cosmological constant. However if inhomogeneities of sizes and amplitudes as observed in the local Universe are considered, their impact on cosmological observations is small.

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