The Universe With Bulk Viscosity  

作　　者：王晓妮[1] 张洁[1] 等 

机构地区：[1]中国人民解放军85医院，上海200052

出　　处：《Chinese Journal of Astronomy and Astrophysics》2003年第2期113-118,共6页中国天文和天体物理学报（英文版）

摘　　要：Exact solutions for a model with variable G, A and bulk viscosity are obtained. Inflationary solutions with constant (de Sitter-type) and variable energy density are found. An expanding anisotropic universe is found to isotropize during its expansion but a static universe cannot isotropize. The gravitational constant is found to increase with time and the cosmological constant decreases with time asExact solutions for a model with variable G, A and bulk viscosity are obtained. Inflationary solutions with constant (de Sitter-type) and variable energy density are found. An expanding anisotropic universe is found to isotropize during its expansion but a static universe cannot isotropize. The gravitational constant is found to increase with time and the cosmological constant decreases with time as

关 键 词：cosmology: theory - cosmological parameters 

分 类 号：P159[天文地球—天文学]