TITLE:
Bianchi Type-V Cosmological Models for Perfect Fluid with Time-Varying Gravitational and Cosmological Constant
AUTHORS:
Mohammed Aman Ullah, Mohammad Amjad Hossain, Mohammad Moksud Alam
KEYWORDS:
LRS Bianchi Type-V, Perfect Fluid, Gravitational Constant, Cosmological Constant, Particle Creation
JOURNAL NAME:
Journal of Applied Mathematics and Physics,
Vol.5 No.11,
November
29,
2017
ABSTRACT: Einstein’s field equations with variable gravitational and cosmological constants are considered in presence of perfect fluid for locally-rotationally-symmetric (LRS) Bianchi type-V space-time discussion in context of the particle creation. We present new shear free solutions for both absence and presence of particle creation. The solution describes the particle and entropy generation in the anisotropic cosmological models. We observe that time variation of gravitational and cosmological constant is needed for particle creation phenomena. Moreover, we obtained the particle production rate Γ(t) for this model and discussed in detail.