LRS Bianchi type-II bulk viscous cosmic string model in a scale covariant theory of gravitation

被引：12
|
作者：
Reddy, D. R. K. [1 ]
Naidu, R. L. [2 ]
Ramprasd, T. [2 ]
Ramana, K. V. [3 ]
机构：
[1] MVGR Coll Engn, Dept Sci & Humanities, Vizainagaram, Andhra Pradesh, India
[2] GMR Inst Technol, Dept Basic Sci & Humanities, Rajam, India
[3] Govt Paderu, Res Polytech, Paderu, AP, India
来源：
ASTROPHYSICS AND SPACE SCIENCE | 2013年 / 348卷 / 01期
关键词：
Scale covariant theory; Cosmic string; Bulk viscosity; Bianchi type-II model; CONSTANT DECELERATION PARAMETER; COSMOLOGICAL MODELS; TENSOR THEORY; UNIVERSE; VISCOSITY;
D O I：
10.1007/s10509-013-1539-6
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
A locally rotationally symmetric(LRS) Bianchi type-II space-time is considered in the frame work of a modified theory of gravitation proposed by Canuto et al. (Phys. Rev. Lett. 39:429, 1977) when the source for energy momentum tensor is a bulk viscous fluid containing one dimensional cosmic strings. A special law of variation for Hubble's parameter proposed by Bermann (Nuovo Cimento B 74:182, 1983) is used to obtain determinate solution of the field equations. We have also used the barotropic equation of state and the bulk viscous pressure is assumed to be proportional to the energy density. The physical and kinematical properties of the model are also discussed.
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页码：241 / 245
页数：5
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