Isotropization of Bianchi class A models with curvature for a minimally coupled scalar tensor theory
| Autor: | Stéphane Fay |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Physics
Physics and Astronomy (miscellaneous) FOS: Physical sciences Monotonic function General Relativity and Quantum Cosmology (gr-qc) Function (mathematics) Curvature General Relativity and Quantum Cosmology Scalar–tensor theory Proper time Constant (mathematics) Flatness (cosmology) Scalar field Mathematical physics |
| Zdroj: | Classical and Quantum Gravity. 20:1363-1378 |
| ISSN: | 0264-9381 |
| DOI: | 10.1088/0264-9381/20/7/308 |
| Popis: | We look for necessary isotropisation conditions of Bianchi class $A$ models with curvature in presence of a massive and minimally coupled scalar field when a function $\ell$ of the scalar field tends to a constant, diverges monotonically or with sufficiently small oscillations. Isotropisation leads the metric functions to tend to a power or exponential law of the proper time $t$ and the potential respectively to vanish as $t^{-2}$ or to a constant. Moreover, isotropisation always requires late time accelerated expansion and flatness of the Universe. 20 pages |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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