Viscous inflationary universe models
The research on viscous cosmological models is reviewed. Inflationary cosmological models of Bianchi type-I with shear, bulk, and nonlinear viscosity are studied. The inflation field energy is represented by a two- component cosmic fluid consisting of a vacuum fluid and a Zel'dovich fluid. It i...
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| Veröffentlicht in: | Astrophysics and space science 1990-11, Vol.173 (2), p.191-225 |
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| container_title | Astrophysics and space science |
| container_volume | 173 |
| creator | Gron, O |
| description | The research on viscous cosmological models is reviewed. Inflationary cosmological models of Bianchi type-I with shear, bulk, and nonlinear viscosity are studied. The inflation field energy is represented by a two- component cosmic fluid consisting of a vacuum fluid and a Zel'dovich fluid. It is shown that there exist models in which the viscous Zel'dovich fluid removes the initial singularity of the corresponding viscosity free models. The mean expansion of a Zel'dovich dominated universe is found to be independent of shear viscosity and anisotropy. Bulk viscosity and shear viscosity cause exponential decay of anisotropy, while nonlinear viscosity causes power-law decay of anisotropy. (Author) |
| doi_str_mv | 10.1007/BF00643930 |
| format | Article |
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Inflationary cosmological models of Bianchi type-I with shear, bulk, and nonlinear viscosity are studied. The inflation field energy is represented by a two- component cosmic fluid consisting of a vacuum fluid and a Zel'dovich fluid. It is shown that there exist models in which the viscous Zel'dovich fluid removes the initial singularity of the corresponding viscosity free models. The mean expansion of a Zel'dovich dominated universe is found to be independent of shear viscosity and anisotropy. Bulk viscosity and shear viscosity cause exponential decay of anisotropy, while nonlinear viscosity causes power-law decay of anisotropy. 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| ispartof | Astrophysics and space science, 1990-11, Vol.173 (2), p.191-225 |
| issn | 0004-640X 1572-946X |
| language | eng |
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| source | Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; SpringerLink Journals - AutoHoldings |
| subjects | Astronomy Cosmology Earth, ocean, space Exact sciences and technology Origin and formation of the universe Stellar systems. Galactic and extragalactic objects and systems. The universe |
| title | Viscous inflationary universe models |
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