Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2008-06-16
Phys.Rev.D78:064067,2008
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
LaTeX2e source file, 14 pages, 7 references
Scientific paper
10.1103/PhysRevD.78.064067
We perform a symmetry analysis of modified Brans-Dicke cosmological equations and present exact solutions. We discuss how the solutions may help to build models of cosmology where, for the early universe, the expansion is linear and the equation of state just changes the expansion velocity but not the linearity. For the late universe the expansion is exponential and the effect of the equation of state on the rate of expansion is just to change the constant Hubble parameter.
Arık Metin
Sheftel Mikhail B.
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