Bulk viscous string cosmological models in f(R) gravity

被引：22

作者：

Santhi, M. Vijaya ^{[1
]}

Rao, V. U. M. ^{[1
]}

Aditya, Y. ^{[1
]}

机构：

[1] Andhra Univ, Dept Appl Math, Visakhapatnam 530003, Andhra Prades, India

来源：

CANADIAN JOURNAL OF PHYSICS | 2018年 / 96卷 / 01期

关键词：

Bianchi type-III metric; bulk viscosity; f(R) gravity; modified gravity; cosmic strings; DARK ENERGY-MODEL; BIANCHI-TYPE-II; UNIVERSE; MATTER; VIII;

D O I：

10.1139/cjp-2017-0256

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this paper, we derive f(R) gravity field equations with the help of a spatially homogeneous and anisotropic Bianchi type-III space-time, in the presence of a bulk viscous fluid, containing one-dimensional cosmic strings. Here we obtained the solutions of the field equations, both in the presence and in the absence of cosmic strings, under some specific plausible physical conditions. In particular, cosmological models with bulk viscous strings in f(R) theory of gravity are obtained by using the special law of variation for Hubble's parameter proposed by Berman (Nuovo Cimento, B74, 182 (1983)). Various physical and kinematical properties of the models are also discussed.

引用

页码：55 / 61

页数：7

共 55 条

[21] BIG-BANG MODEL WITHOUT SINGULARITIES [J].

MURPHY, GL .

PHYSICAL REVIEW D, 1973, 8 (12) :4231-4233

[22] Introduction to modified gravity and gravitational alternative for dark energy [J].

Nojiri, Shin'ichi ;

Odintsov, Sergei D. .

INTERNATIONAL JOURNAL OF GEOMETRIC METHODS IN MODERN PHYSICS, 2007, 4 (01) :115-145

[23] VISCOUS UNIVERSES [J].

PADMANABHAN, T ;

CHITRE, SM .

PHYSICS LETTERS A, 1987, 120 (09) :433-436

[24] CAUSAL FRIEDMANN-ROBERTSON-WALKER COSMOLOGY [J].

PAVON, D ;

BAFALUY, J ;

JOU, D .

CLASSICAL AND QUANTUM GRAVITY, 1991, 8 (02) :347-360

[25] Measurements of Ω and Λ from 42 high-redshift supernovae [J].

Perlmutter, S ;

Aldering, G ;

Goldhaber, G ;

Knop, RA ;

Nugent, P ;

Castro, PG ;

Deustua, S ;

Fabbro, S ;

Goobar, A ;

Groom, DE ;

Hook, IM ;

Kim, AG ;

Kim, MY ;

Lee, JC ;

Nunes, NJ ;

Pain, R ;

Pennypacker, CR ;

Quimby, R ;

Lidman, C ;

Ellis, RS ;

Irwin, M ;

McMahon, RG ;

Ruiz-Lapuente, P ;

Walton, N ;

Schaefer, B ;

Boyle, BJ ;

Filippenko, AV ;

Matheson, T ;

Fruchter, AS ;

Panagia, N ;

Newberg, HJM ;

Couch, WJ .

ASTROPHYSICAL JOURNAL, 1999, 517 (02) :565-586

[26]

Ram S., 2012, J MATH PHYS, V3, P9

[27] Exact Bianchi type II, VIII and IX string cosmological models in General Relativity and self-creation theory of gravitation [J].

Rao, V. U. M. ;

Santhi, M. Vijaya ;

Vinutha, T. .

ASTROPHYSICS AND SPACE SCIENCE, 2008, 317 (1-2) :83-88

[28] Exact Bianchi type II, VIII and IX string cosmological models in Saez-Ballester theory of gravitation [J].

Rao, V. U. M. ;

Santhi, M. Vijaya ;

Vinutha, T. .

ASTROPHYSICS AND SPACE SCIENCE, 2008, 314 (1-3) :73-77

[29] Bianchi type-V string cosmological models in f (R, T) gravity [J].

Rao, V. U. M. ;

Rao, D. C. Papa .

ASTROPHYSICS AND SPACE SCIENCE, 2015, 357 (01) :1-5

[30] Bianchi Types II, VIII and IX String Cosmological Models with Bulk Viscosity in Brans-Dicke Theory of Gravitation [J].

Rao, V. U. M. ;

Sireesha, K. V. S. .

INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS, 2012, 51 (10) :3013-3020

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