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《Journal of Anhui Normal University(Natural Science)》 2007-03
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Bianchi Type Ⅸ String Cosmological Models with Bulk Viscosity in General Relativity

WANG Xing-Xiang(The College of Physics and Electronic Information, Anhui Normal University, Wuhu 241000, China)  
The locally rotationally symmetric Bianchi type Ⅸ string cosmological models with bulk viscosity are investigated. The investigation is made in two cases, in the first case a Takabayasi’s equation of state ρ=kλ is assumed and in the second case an assumption of the coefficient of bulk viscosity being proportional to the scalar of expansion ζ=kθ is adopted. The physical features of the models are also discussed. The models describe continuously expanding universe with a big-bang start and includes the results previously given in the literatures as the special cases.
【Fund】: Supported by the Special Project Grants of Anhui Normal University(2003xzx01);; Key the Subject Foundation for Atomic andMolecular Physics of Anhui Province
【CateGory Index】: O412.1
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