Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2004-12-11
Mod.Phys.Lett.A20:2723-2734,2005
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
LaTeX, 12 pages, 4 figures. Several references on supersymmetric Dark Matter and one illustrative plot added. Final version ac
Scientific paper
10.1142/S0217732305018104
We construct simple and useful approximation for the relativistic gas of massive particles. The equation of state is given by an elementary function and admits analytic solution of the Friedmann equation, including more complex cases when the relativistic gas of massive particles is considered together with radiation or with dominating cosmological constant. The model of relativistic gas may be interesting for the description of primordial Universe, especially as a candidate for the role of a Dark Matter.
Berredo-Peixoto Guilherme de
Shapiro Ilya L.
Sobreira Flavia
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