Statefinder and Om Diagnostics for New Generalized Chaplygin Gas Model

被引：11

作者：

Al Mamon, Abdulla ^{[1
]}

Dubey, Vipin Chandra ^{[2
]}

Bamba, Kazuharu ^{[3
]}

机构：

[1] Vidyasagar Univ, Dept Phys, Vivekananda Satavarshiki Mahavidyalaya, Manikpara 721513, India

[2] Jaypee Inst Informat Technol, Dept Math, Noida 201309, India

[3] Fukushima Univ, Fac Symbiot Syst Sci, Div Human Support Syst, Fukushima 9601296, Japan

来源：

UNIVERSE | 2021年 / 7卷 / 10期

关键词：

new GCG; statefinder diagnostic; OBSERVATIONAL CONSTRAINTS; COSMOLOGICAL CONSTANT; INTERACTING MODEL; DARK; LAMBDA; UNIVERSE;

D O I：

10.3390/universe7100362

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We explore a unified model of dark matter and dark energy. This new model is a generalization of the generalized Chaplygin gas model and is known as a new generalized Chaplygin gas (NGCG) model. We study the evolutions of the Hubble parameter and the distance modulus for the model under consideration and the standard lambda CDM model and compare that with the observational datasets. Furthermore, we demonstrate two geometric diagnostics analyses including the statefinder (r,s) and Om(z) to the discriminant NGCG model from the standard lambda CDM model. The trajectories of evolution for (r,s) and Om(z) diagnostic planes are shown to understand the geometrical behavior of the NGCG model by using different observational data points.</p>

引用

页数：12

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