Plane symmetric model with constant deceleration parameter

Abstract

A plane symmetric Bianchi I model is considered with constant deceleration parameter, $q=\alpha -1$, where $\alpha \ge 0$. The model with $\alpha =0$ violates the NEC throughout the evolution, and hence provides a physically unrealistic scenario. The model with $\alpha \ne 0$ 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.

3 pages, no figures