FRW Viscous Cosmological Model with Time Periodically Varying Deceleration Parameter In f(R, T)Gravity

被引：0

作者：

Ramanamurty, M. ^{[1
]}

Santhikumar, Rajamahanthi ^{[1
]}

Sobhanbabu, K. ^{[2
]}

机构：

[1] Aditya Inst Technol & Management, Srikakulam Dist 532201, Andhra Prades, India

[2] Univ Coll Engn JNTUK, Guntur 522616, Andhra Prades, India

来源：

JOURNAL OF SIBERIAN FEDERAL UNIVERSITY-MATHEMATICS & PHYSICS | 2025年 / 18卷 / 02期

关键词：

bulk viscous fluid; time period; decelerating parameter; accelerating expansion; UNIVERSE;

D O I：

暂无

中图分类号：

O1 [数学];

学科分类号：

0701 ; 070101 ;

摘要：

This research paper investigates the dynamics of a Friedmann-Robertson-Walker cosmological model characterized by perfect fluid pressure and barotropic bulk viscous pressure. By obtaining exact solutions to Einstein's field equations with a time-varying periodic deceleration parameter, the study reveals periodic behaviour in most parameters, attributed to the influence of a cosine function in the deceleration parameter. The analysis delves into the physical and dynamical implications of this model, particularly highlighting how negative pressure contributes to the late-time expansion of the universe.

引用

页码：241 / 250

页数：10

共 22 条

[1] A cyclic universe with varying cosmological constant in f(R, T) gravity [J].

Ahmed, Nasr ;

Alamri, Sultan Z. .

CANADIAN JOURNAL OF PHYSICS, 2019, 97 (10) :1075-1082

[2]

Akta C., 2017, Curr. Res. Int, V11, DOI DOI 10.1002/CPPS.36

[3] Dark energy cosmology: the equivalent description via different theoretical models and cosmography tests [J].

Bamba, Kazuharu ;

Capozziello, Salvatore ;

Nojiri, Shin'ichi ;

Odintsov, Sergei D. .

ASTROPHYSICS AND SPACE SCIENCE, 2012, 342 (01) :155-228

[4] Generalized Chaplygin gas, accelerated expansion, and dark-energy-matter unification [J].

Bento, MC ;

Bertolami, O ;

Sen, AA .

PHYSICAL REVIEW D, 2002, 66 (04)

[5] Cosmic microwave background and supernova constraints on quintessence: Concordance regions and target models [J].

Caldwell, RR ;

Doran, M .

PHYSICAL REVIEW D, 2004, 69 (10)

[6] INFLATIONARY UNIVERSE - A POSSIBLE SOLUTION TO THE HORIZON AND FLATNESS PROBLEMS [J].

GUTH, AH .

PHYSICAL REVIEW D, 1981, 23 (02) :347-356

[7] f(R, T) gravity [J].

Harko, Tiberiu ;

Lobo, Francisco S. N. ;

Nojiri, Shin'ichi ;

Odintsov, Sergei D. .

PHYSICAL REVIEW D, 2011, 84 (02)

[8] Bianchi-I cosmology with generalised Chaplygin gas and periodic deceleration parameter [J].

Hulke, N. ;

Singh, G. P. ;

Bishi, Binaya K. .

INDIAN JOURNAL OF PHYSICS, 2022, 96 (13) :4033-4049

[9] Variable Chaplygin gas cosmologies in f(R, T) gravity with particle creation [J].

Hulke, N. ;

Singh, G. P. ;

Bishi, Binaya K. ;

Singh, Ashutosh .

NEW ASTRONOMY, 2020, 77

[10] Accelerating anisotropic cosmological model in f(R,T) theory of gravity [J].

Kumar, R. Santhi ;

Satyannarayana, B. .

INDIAN JOURNAL OF PHYSICS, 2017, 91 (10) :1293-1296

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