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arXiv · 2303.14575

Observational constrained $F(R, \mathcal{G})$ gravity cosmological model and the dynamical system analysis

Santosh V. Lohakare·Krishna Rathore·B. Mishra
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Abstract

In this paper, we have analyzed the geometrical and dynamical parameters of $\mathcal{F}(R, \mathcal{G})=\alpha R^2 \mathcal{G}^\beta$ cosmological model, ($R$, $\mathcal{G}$ being the Ricci scalar and Gauss-Bonnet invariant respectively), constraining the parameters through the cosmological data sets. It is exhibited that the model admits a viable radiation era, and early deceleration followed by late-time acceleration in the matter-dominated era. From the phase-space, portrait stability criterion has been analysed, restricting the parameter $\beta$, different from $\beta=-1$. Additionally, we have explored the stability of the model from the behavior of critical points and obtained the present value of the density parameter for matter-dominated and dark energy components, which are identical to those obtained through cosmological data sets.

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Santosh V. Lohakare, Krishna Rathore, B. Mishra. 2023-03-25. Observational constrained $F(R, \mathcal{G})$ gravity cosmological model and the dynamical system analysis. https://doi.org/10.1088/1361-6382%2Facfc0f

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