Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2001-03-05
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
7 pages, LaTeX2e
Scientific paper
The Machian cosmological solution satisfying $\phi =O(\rho /\omega)$ in the generalized scalar-tensor theory of gravitation with the varying cosmological constant is summarized. The scalar field $\phi $ with the exponential potential is introduced as dark matter and the barotropic evolution of matter in the universe is discussed. As the universe expands, the coefficient $\gamma $ of the equation of state approaches to -1/3 and the coupling function $\omega (\phi)$ diverges to $-\infty $.
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