Some cosmological features of 4D Gauss-Bonnet gravity with varying cosmological constant

TL;DR

This paper investigates the cosmological implications of a novel 4D Gauss-Bonnet gravity model with a varying cosmological constant, analyzing stability, cosmography, and observational constraints.

Contribution

It introduces two models of 4D Gauss-Bonnet gravity with a varying cosmological constant and examines their stability and cosmological features under observational constraints.

Findings

Models are consistent with cosmic transit and flat curvature.

Stability analysis supports the viability of the models.

Cosmography aligns with observed cosmic behavior.

Abstract

We explore some cosmological features of the newly suggested 4D Gauss-Bonnet gravity through two different models assuming a varying cosmological constant. Observational constraints, such as the cosmic transit and the flat curvature, have been considered in constructing the models. The cosmology in the current work has been probed using a given scale factor derived from the desired cosmic behavior which is the inverse of the usual viewpoint. The stability and cosmography have been studied for the two models.