Abstract: A method is investigated which enables exact solutions to be found for k=0 Friedmann cosmological models with a perfect fluid satisfying the equation of states p=(\ensuremath{\gamma}-1)\ensuremath{\rho}, where \ensuremath{\gamma} is constant and 0\ensuremath{\le}\ensuremath{\gamma}\ensuremath{\le}2, in scalar-tensor gravity theories with an arbitrary form for the gravitational coupling function \ensuremath{\omega}(\ensuremath{\varphi}), which defines the theory. A number of explicit solutions are investigated for p=0 universes and inflationary universes, including those for theories in which \ensuremath{\omega}(\ensuremath{\varphi}) has a power-law dependence on the scalar field \ensuremath{\varphi}. When p=-\ensuremath{\rho} new varieties of inflation arise in which a(t)\ensuremath{\propto}${\mathit{t}}^{\mathit{n}}$exp(${\mathit{H}}_{0}$${\mathit{t}}^{\mathit{m}}$).
Publication Year: 1994
Publication Date: 1994-09-15
Language: en
Type: article
Indexed In: ['crossref', 'pubmed']
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Cited By Count: 117
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