Cosmological Model with Bilinear Deceleration Parameter

Abstract

The study of cosmological models with time dependent DP (deceleration parameter) is one of the important topics of research in these days. After publishing the research findings regarding the accelerating expansion of the universe by Perlmutter and Riess et al.1,2, the subject is getting huge attention by the researchers. The variable DP has much importance to measure the expansion rate and it provides the opportunities to analyze the results. Due to the importance of the subject, we have decided to study the cosmological models with bilinear DP. We have assumed DP as a bilinear function of proper cosmic time as suggested by Mishra et al.3and investigated the various cosmological aspects of the model presented in pictorial form in this paper.