Statefinder Diagnostic for Variable Modified Chaplygin Gas in LRS Bianchi Type I Universe

Abstract EN

The Locally Rotationally Symmetric (LRS) Bianchi type I cosmological model with variable modified Chaplygin gas having the equation of state p=Aρ−B/ρα, where 0≤α≤1, A is a positive constant, and B is a positive function of the average-scale factor a(t) of the universe (i.e., B=B(a)) has been studied.

It is shown that the equation of state of the variable modified Chaplygin gas interpolates from radiation-dominated era to quintessence-dominated era.

The statefinder diagnostic pair (i.e., {r,s} parameter) is adopted to characterize different phases of the universe.