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

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arxiv 2206.10113 v1 pith:QZFSEOSG submitted 2022-06-21 gr-qc

Vinod Kumar Bhardwaj , Anirudh Pradhan , Nasr Ahmed , A. A. Shaker This is my paper
classification gr-qc
keywords universeenergybeenclosedconditioncosmographiccurvaturegravity
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abstract

Modeling 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 which favor 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.

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