Transit string dark energy models in f(Q) gravity

被引：9

作者：

Maurya, Dinesh Chandra ^{[1
]}

Dixit, Archana ^{[2
]}

Pradhan, Anirudh ^{[3
]}

机构：

[1] IASE Deemed Univ Sardarshahar, Fac Sci, Dept Math, Churu 331403, Rajsthan, India

[2] GLA Univ, Inst Appl Sci & Humanities, Dept Math, Mathura 281406, Uttar Pradesh, India

[3] GLA Univ, Ctr Cosmol Astrophys & Space Sci CCASS, Mathura 281406, Uttar Pradesh, India

来源：

INTERNATIONAL JOURNAL OF GEOMETRIC METHODS IN MODERN PHYSICS | 2023年 / 20卷 / 08期

关键词：

Anisotropic universe; f(Q)-gravity; string-fluid; observational constraints; transit universe; SYMMETRIC INHOMOGENEOUS UNIVERSE; HUBBLE-SPACE-TELESCOPE; LUMINOUS RED GALAXIES; COSMOLOGICAL MODELS; INDEPENDENT CONSTRAINTS; ACCELERATING UNIVERSE; COSMOGRAPHY; SUPERNOVA; DECELERATION; TIME;

D O I：

10.1142/S0219887823501347

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this paper, we have investigated an anisotropic cosmological model in f(Q) gravity with string fluid in LRS Bianchi type-I universe. We have considered the arbitrary function f(Q) = Q + avQ + 2?, where a is model free parameter and ? is the cosmological constant. We have established a relationship between matter energy density parameter O-m and dark energy density parameter O-? through Hubble function using constant equation of state parameter ?. We have made observational constraint on the model using ?(2)-test with observed Hubble datasets H(z) and SNe Ia datasets, and obtained the best fit values of cosmological parameters. We have used these best fit values in the result and discussion. We have discussed our result with cosmographic coefficients and found a transit phase dark energy model. Also, we analyzed the Om diagnostic function for anisotropic universe and found that our model is quintessence dark energy model.

引用

页数：27

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