Exploring the cosmological model in f (R, TO) gravity with observational constraints

被引：9

作者：

Bhardwaj, Vinod Kumar ^{[1
]}

Garg, Priyanka ^{[1
]}

机构：

[1] GLA Univ, Math, Mathura 281406, Uttar Pradesh, India

来源：

NEW ASTRONOMY | 2024年 / 105卷

关键词：

FLRW metric; f(RTO) gravity; Observational constraints; Energy conditions; BARYON ACOUSTIC-OSCILLATIONS; DARK-MATTER; ENERGY CONDITIONS; F(R) THEORIES; DECELERATION; CONSTANT; RECONSTRUCTION; ACCELERATION; CONSEQUENCES; INFLATIONARY;

D O I：

10.1016/j.newast.2023.102101

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have investigated an isotropic and homogeneous cosmological model of the universe in f (R, TO) gravity, where TO is the trace of the energy-momentum tensor and R is the Ricci scalar. We developed and presented exact solutions of field equations of the proposed model by taking the parametrization q(z) = a + 6z 1+z, where a and 6 are arbitrary constants. The best possible values of the model's free parameters are estimated using the latest observational data sets of OHD, BAO, and Pantheon by applying MCMC statistical technique. Some kinematic properties like density parameter O, pressure pO, and equation of state parameter coO are derived. We have also discussed the behavior of the scalar potential V(O) in the f (R, TO) gravity theory. The behaviors of scalar fields for quintessence and phantom models are explored. Furthermore, we have discussed the behavior of energy conditions and sound speed in f (R, TO) cosmology.

引用

页数：8

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