ROLE OF GENERALIZED COSMIC CHAPLYGIN GAS IN ACCELERATING UNIVERSE: A FIELD THEORETICAL PRESCRIPTION

被引：15
|
作者：
Rudra, Prabir [1 ,2 ]
机构：
[1] Bengal Engn & Sci Univ, Dept Math, Sibpur 711103, Howrah, India
[2] Pailan Coll Management & Technol, Dept Math, Kolkata 700104, India
来源：
MODERN PHYSICS LETTERS A | 2013年 / 28卷 / 22期
关键词：
Dark energy; scalar field; Chaplygin gas; statefinder; CONSTRAINTS;
D O I：
10.1142/S0217732313501022
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
In this paper, we investigate the role played by dark energy (DE) in the form of Generalized cosmic Chaplygin gas in an accelerating universe described by FRW cosmology. We have tried to describe the model from the theoretical point of view of a field, by introducing a scalar field phi and a self-interacting potential V(phi). The corresponding expressions for the field are obtained for the given model. Statefinder parameters have been used to characterize the dark energy model. Plots have been generated for characterizing different phases of universe diagrammatically and a comparative study is performed with the Modified Chaplygin gas model. As an outcome of the study, Generalized cosmic Chaplygin gas is identified as a much less constrained form of dark energy as compared to modified Chaplygin gas.
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页数：15
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