Cosmological evolution of modified QCD ghost dark energy in dynamical Chern-Simons gravity

被引：14
|
作者：
Jawad, Abdul [1 ]
Sohail, Ayesha [1 ]
机构：
[1] COMSATS Inst Informat Technol, Dept Math, Lahore, Pakistan
来源：
ASTROPHYSICS AND SPACE SCIENCE | 2015年 / 359卷 / 02期
关键词：
Dynamical Chern-Simons modify gravity; Modified Generalized ghost dark energy; Cold dark matter; Cosmological parameters; PROBE WMAP OBSERVATIONS; HUBBLE-SPACE-TELESCOPE; CONSTANT; CONSTRAINTS; MODELS;
D O I：
10.1007/s10509-015-2506-1
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
In this paper, we discuss the dark energy phenomenon by considering the modified QCD ghost dark energy in the framework of dynamical Chern-Simons modified gravity. We find analytical solution of scale factor and explore different cosmological parameters in this scenario. We observe that the deceleration parameter characterizes different phases of the universe under certain conditions of constant parameters. It is pointed out that equation of state parameter as well as cosmological planes (omega(D)-omega'(D) and r-s) provides the consistent results with the present day observations. Also, the squared speed of sound predicts the stability of the present dark energy model for all the time. We also discuss the dynamics of scalar field and potentials of various scalar field models and found interesting results in this framework.
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页数：9
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