Existence of bulk viscous universe in f(R, T) gravity and confrontation with observational data

被引:29
|
作者
Yadav, Anil Kumar [1 ]
Sharma, Lokesh Kumar [2 ]
Singh, B. K. [2 ]
Sahoo, P. K. [3 ]
机构
[1] United Coll Engn & Res, Dept Phys, Greater Noida 201306, India
[2] GLA Univ, Dept Phys, Mathura 281406, India
[3] Birla Inst Technol & Sci Pilani, Dept Math, Hyderabad Campus, Hyderabad 500078, India
关键词
Cosmological parameters; Bulk viscosity; f(R; T); gravity; LRS Bianchi-I space-time; BARYON ACOUSTIC-OSCILLATIONS; DARK; SUPERNOVAE; DISTANCE; MODELS; MAPS;
D O I
10.1016/j.newast.2020.101382
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
In this paper we have investigated a bulk viscous universe in f(R, T) gravity where R and T are the Ricci scalar and trace of energy momentum tensor respectively. We have obtained explicit solutions of field equations in modified gravity by considering the power law form of scale factor. The Hubble parameter and deceleration parameter are derived in terms of cosmic time and redshift both. We have estimated the present values of these parameters with observational Hubble data and SN Ia data sets. At 1s level, the estimated values of q(0) and m are obtained as q(0) = -0.30 +/- 0.05 & m = 0.70 +/- 0.02 where q(0) is the present value of deceleration parameter and m is the model parameter. The energy conditions and Om(z) analysis for the anisotropic LRS Bianchi type I model are also discussed.
引用
收藏
页数:7
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