Plane symmetric model with constant deceleration parameter

Abstract

A plane symmetric Bianchi I model is considered with constant deceleration parameter, q = α − 1, where α ≥ 0. The model with α = 0 violates the NEC throughout the evolution, and hence provides a physically unrealistic scenario. The model with α = 0 obeys the NEC and WEC at late times, which shows that the models in this case can render a physical realistic cosmological scenario, though for a restricted period of time. It is also shown that the physical and kinematical behaviour of both models remain similar to an LRS Bianchi I model.