Cosmographic analysis of a closed bouncing universe with the varying cosmological constant in f(R, T) gravity

Abstract

Modelling of matter bounce in f( R, T) gravity has been presented with no violation of the null energy condition. Only a closed universe with negative pressure is allowed in good agreement with some recent observations that favour a universe with positive curvature. Our results agree with some recent works in which a combination of positive curvature and vacuum energy leads to non-singular bounces with no violation of the null energy condition. The stability of the model has been discussed. The cosmographic parameters are developed for the derived model to explain the accelerated expansion of the universe.