An entirely analytical cosmological model

Details An entirely analytical cosmological model An entirely analytical cosmological model

2008-03-28

arxiv.org/abs/0803.4006v1

Mod.Phys.Lett.A24:531-540,2009

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

4 pages (revtex4), 4 figures

Scientific paper

10.1142/S021773230902845X

The purpose of the present study is to show that in a particular cosmological model, with an affine equation of state, one can obtain, besides the background given by the scale factor, Hubble and deceleration parameters, a representation in terms of scalar fields and, more important, explicit mathematical expressions for the density contrast and the power spectrum. Although the model so obtained is not realistic, it reproduces features observed in some previous numerical studies and, therefore, it may be useful in the testing of numerical codes and as a pedagogical tool.

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