Bianchi Type-Ⅲ String Cosmological Model With Bulk Viscosity and Magnetic Field |
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引用本文: | 王行翔.Bianchi Type-Ⅲ String Cosmological Model With Bulk Viscosity and Magnetic Field[J].中国物理快报,2006,23(7):1702-1704. |
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作者姓名: | 王行翔 |
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作者单位: | Department of Physics, Anhui Normal University, Wuhu 241000 |
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基金项目: | Supported by the Key Subject Foundation for Atomic and Molecular Physics of Anhui Province. |
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摘 要: | The Bianchi type-Ⅲ cosmological model for a cloud string in the presence of bulk viscosity and magnetic field are presented. To obtain the determinate model it is assumed that there is an equation of state ρ = kA and the scalar of expansion is proportional to the shear scalar θ ∝ σ, which leads to a relation between metric potentials B = mC^n. The physical and geometric aspects of the model are also discussed. The model describes a shearing non-rotating continuously expanding universe with a big-bang start. In the absence of magnetic field, it reduces to the string model with bulk viscosity that was previously given in the literature.
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关 键 词: | 宇宙模型 磁场 确定模型 天体物理学 |
收稿时间: | 2006-01-11 |
修稿时间: | 2006-01-11 |
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