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29 March 2024
 
  » arxiv » astro-ph/9903368

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Asymptotic and Exact Solutions of Perfect-Fluid Scalar-Tensor Cosmologies
A. Navarro ; A. Serna J.-M. Alimi ;
Date 24 Mar 1999
Journal Phys.Rev. D59 (1999) 124015
Subject astro-ph gr-qc
AffiliationUniv. de Murcia, Murcia, Spain), A. Serna (U. Miguel Hernandez, Elche, Spain) J.-M. Alimi (LAEC, Observatoire de Meudon, France
AbstractWe present a method which enables exact solutions to be found for at homogeneous and isotropic scalar-tensor cosmologies with an arbitrary $omega(Phi)$ function and satisfying the general perfect fluid state equation $P=(gamma-1) ho c^2$. This method has been used to analyze a wide range of asymptotic analytical solutions at early and late times for different epochs in the cosmic history: false vacuum inflationary models, vacuum and radiation-dominated models, and matter-dominated models. We also describe the qualitative behavior of models at intermediary times and give exact solutions at any time for some particular scalar-tensor theories.
Source arXiv, astro-ph/9903368
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