Mutually interacting tachyon dark energy with variable G and Λ

被引：17

作者：

Sadeghi, Jafar ^{[1
]}

Khurshudyan, Martiros ^{[2
]}

Hakobyan, Margarit ^{[3
,4
]}

Farahani, Hoda ^{[1
]}

机构：

[1] Univ Mazandaran, Fac Basic Sci, Dept Phys, Babol Sar, Iran

[2] Max Planck Inst Colloids & Interfaces, D-14476 Potsdam, Germany

[3] AI Alikhanyan Natl Sci Lab, Yerevan, Armenia

[4] Yerevan State Univ, Dept Nucl Phys, Yerevan 375049, Armenia

来源：

RESEARCH IN ASTRONOMY AND ASTROPHYSICS | 2015年 / 15卷 / 02期

关键词：

cosmology; early universe; cosmological parameters; dark energy; GENERALIZED CHAPLYGIN-GAS; COSMOLOGICAL CONSTANT; EQUATION; CONSEQUENCES; COMPONENT; MODELS;

D O I：

10.1088/1674-4527/15/2/002

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We consider a tachyonic scalar field as a model of dark energy with interaction between components in the case of variable G and Lambda. We assume a flat Universe with a specific form of scale factor and study cosmological parameters numerically and graphically. Statefinder analysis is also performed. For a particular choice of interaction parameters we succeed in obtaining an analytical expression of densities. We find that our model will be stable at the late stage but there is an instability in the early Universe, so we propose this model as a realistic model of our Universe.

引用

页码：175 / 190

页数：16

共 49 条

[21] Probable values of the cosmological constant in a holographic theory [J].