Anisotropic Bulk Viscous String Cosmological Model in a Scalar-Tensor Theory of Gravitation

被引：11

作者：

Reddy, D. R. K. ^{[1
]}

Rao, Ch. Purnachandra ^{[1
]}

Vidyasagar, T. ^{[2
]}

Vijaya, R. Bhuvana ^{[3
]}

机构：

[1] MVGR Coll Engn, Dept Engn Math, Vizianagaram 535001, India

[2] Miracle Educ Soc Grp Inst, Vizianagaram 535001, India

[3] JNTU Coll Engn, Dept Math, Anantapur 515002, Andhra Pradesh, India

来源：

ADVANCES IN HIGH ENERGY PHYSICS | 2013年 / 2013卷

关键词：

PROBE WMAP OBSERVATIONS; KALUZA-KLEIN UNIVERSE; COSMIC STRINGS; VISCOSITY; NONEXISTENCE; FLUID; SAEZ;

D O I：

10.1155/2013/609807

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

Spatially homogeneous, anisotropic, and tilted Bianchi type-VI 0 model is investigated in a new scalar-tensor theory of gravitation proposed by Saez and Ballester (1986) when the source for energy momentum tensor is a bulk viscous fluid containing onedimensional cosmic strings. Exact solution of the highly nonlinear field equations is obtained using the following plausible physical conditions: (i) scalar expansion of the space-time which is proportional to the shear scalar, (ii) the barotropic equations of state for pressure and energy density, and (iii) a special law of variation for Hubble's parameter proposed by Berman (1983). Some physical and kinematical properties of the model are also discussed.

引用

页数：5

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