Anisotropic cosmological models with bulk viscosity for variable G and Λ
| Autor: | Subenoy Chakraborty, Anusua Roy |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Physics
Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Cosmological constant Volume viscosity Square (algebra) Cosmology Gravitational constant General Relativity and Quantum Cosmology Viscosity Space and Planetary Science Stress–energy tensor Axial symmetry Mathematical physics |
| Zdroj: | Astrophysics and Space Science. 313:389-392 |
| ISSN: | 1572-946X 0004-640X |
| DOI: | 10.1007/s10509-007-9708-0 |
| Popis: | In this paper we have considered axially symmetric Bianchi-I, Kantowski Sachs and Bianchi-III space-time models with bulk viscosity, where the gravitational constant G and the cosmological term Λ vary with time. In Einstein equations this variation in G and Λ are taken in such a way as to preserve the energy momentum tensor. Solutions are obtained with the cosmological term varying inversely with square of time. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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