Kaluza-Klein Universe with Wet Dark Fluid in General Relativity

Abstract

Kaluza- Klein Universe filled with dark energy from a wet dark fluid has been considered. A new equation of state for dark energy component of the Universe has been used. It is modeled on the equation of state p=γ(ρ-ρ_*) which can describe a liquid, for example water. The exact solution to the corresponding field equations are obtained in quadrature form. The solution for constant deceleration parameter have been studied in detail for both power-law and exponential forms. The cases γ=1 and γ=1 have also been analyzed.