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Bianchi Type-I Cosmology with Cosmic String and Bulk Viscosity
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| WANG Xing-Xiang |
| Department of Physics, Anhui Normal University, Wuhu 241000 |
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| Cite this article: |
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WANG Xing-Xiang 2003 Chin. Phys. Lett. 20 1674-1677 |
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Abstract Some locally rotationally symmetric Bianchi type-I cosmological solutions for a cloud string with bulk viscosity are presented. In the first case, an equation of state ρ = kλ and the relation between metric potentials R = ASn are considered, and the solution represents shearing non-rotating model with the bulk viscosity ∝ ρ1/2, where ρ is the rest energy density of the cloud of strings with particles attached to them, λ is the tension density of the cloud of strings, is the coefficient of the bulk viscosity, R and S are only the functions of time t, while A and k are constant. In the second case, the constant coefficient of bulk viscosity is considered.
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| Keywords:
04.20.Jb
98.80.Cq
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Published: 01 October 2003
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| PACS: |
04.20.Jb
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(Exact solutions)
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98.80.Cq
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(Particle-theory and field-theory models of the early Universe (including cosmic pancakes, cosmic strings, chaotic phenomena, inflationary universe, etc.))
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