Anisotropic Plane Symmetric Two-Fluid Cosmological Model with Time-Varying G and A

作     者：Verma M. K. Chandel S. Ram Shri 

作者机构：Department of Mathematics BBD NITM Lucknow 226028 India Department of Mathematical Sciences Indian Institute of Technology (Banaras Hindu University) Varanasi 221005 India 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2015年第32卷第12期

页      面：1-4页

核心收录：

学科分类：07[理学] 080704[工学-流体机械及工程] 08[工学] 0807[工学-动力工程及工程热物理] 070401[理学-天体物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0704[理学-天文学] 

主　　题：Anisotropic Plane Symmetric Two-Fluid Cosmological Model with Time-Varying G and A FRW 

摘      要：We investigate a two-fluid anisotropic plane symmetric cosmological model with variable gravitational constant G（t） and cosmological term A（t）. In the two-fluid model, one fluid is chosen to be that of the radiation field modeling the cosmic microwave background and the other one a perfect fluid modeling the material content of the universe. Exact solutions of the field equations are obtained by using a special form for the average scale factor which corresponds to a specific time-varying deceleration parameter. The model obtained presents a cosmological scenario which describes an early acceleration and late-time deceleration. The gravitation constant increases with the cosmic time whereas the cosmological term decreases and asymptotically tends to zero. The physical and kinematical behaviors of the associated fluid parameters are discussed.