Interaction of Gravitational field and Brans-Dicke field in R/W universe containing Dark Energy like fluid  

作　　者：Kangujam Priyokumar Singh Koijam Manihar Singh Mukunda Dewri 

机构地区：[1]Department of Mathematical Sciences, Bodoland University [2]Department of Mathematics, NIT Manipur

出　　处：《Research in Astronomy and Astrophysics》2016年第4期97-106,共10页天文和天体物理学研究（英文版）

摘　　要：On studying some new models of Robertson-Walker universes with a Brans-Dicke scalar field, it is found that most of these universes contain a dark energy like fluid which confirms the present scenario of the expansion of the universe. In one of the cases, the exact solution of the field equations gives a universe with a false vacuum, while in another it reduces to that of dust distribution in the Brans-Dicke cosmology when the cosmological constant is not in the picture. In one particular model it is found that the universe may undergo a Big Rip in the future, and thus it will be very interesting to investigate such models further.On studying some new models of Robertson-Walker universes with a Brans-Dicke scalar field, it is found that most of these universes contain a dark energy like fluid which confirms the present scenario of the expansion of the universe. In one of the cases, the exact solution of the field equations gives a universe with a false vacuum, while in another it reduces to that of dust distribution in the Brans-Dicke cosmology when the cosmological constant is not in the picture. In one particular model it is found that the universe may undergo a Big Rip in the future, and thus it will be very interesting to investigate such models further.

关 键 词：Brans-Dicke scalar field -- cosmological constant -- dark energy -- quintessence -- k-essence -- big rip 

分 类 号：P159[天文地球—天文学]