Curvature dominance DE-model in -gravity
arXiv:2204.07604 · doi:10.1007/s12648-023-02674-3
Abstract
We have probed a cosmological model in -gravity, which is a cubic equation in scalar curvature . The terms arise due to nonlinear function are treated as energy due to curvature inspired geometry. As a result, we find accelerating expansion in the universe, which creates an anti-gravitating negative pressure in it. Some of the physical parameters are solved using numerical methods. The evolution of the model are examined by the latest observational Hubble data (46-data points) and Pantheon data (the latest compilation of SNIa with 40 binned in the redshift range ). Some important features of the model have been discussed by analyzing the plots of various dynamical parameters. The plots of deceleration parameter and the Hubble parameter describe the accelerating expansion in the evolution of the Universe at the present epoch. The transition from deceleration to acceleration for our model is obtained at redshift , which is in good agreement with CDM. We have also carried out state finder analysis for our model. The analysis of specific features of the model confirms that our model is consistent with CDM in late times.
9 pages, 10 figures
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