Transit universe with time varying $G$ and decaying $\Lambda$

Abstract

We present the model of transit universe from early deceleration phase to current acceleration phase under the framework of general relativity in presence of gravitational coupling $G(t)$ and cosmological terms $\Lambda (t)$. The Einstein's field equations have been solved by considering time dependent deceleration parameter (DP) which renders the scale factor $a=(t^n{e}^{kt}{)}^{\frac{1}{m}}$ where $m$, $n$ and $k$ are positive constants. The cosmological term $(\Lambda (t))$ is found to be positive and a decreasing function of time which supports the result obtained from supernovae Ia observations. The geometrical and kinematical features of the model are examined in detail.

8 pages, 4 figures

References in corpus (2)

• Irrotational Bianchi V Viscous Fluid Cosmology with Heat Flux
• Cosmological constant dominated transit universe from early deceleration to current acceleration phase in Bianchi-V space-time

Cited by in corpus (8)

• Unified dark fluid in Brans-Dicke theory
• Transitioning Universe with hybrid scalar field in Bianchi I space-time
• A transitioning universe with anisotropic dark energy
• Bianchi type-I transit cosmological models with time dependent gravitational and cosmological constants - reexamined
• Transitioning scenario of Bianchi-I universe within $f\left(R,T\right)$ formalism
• Accelerating model of flat universe in $f(R,T)$ gravity
• An Interacting Scenario for Dark Energy in Bianchi Type-I Universe
• Interacting Viscous Dark Energy in Bianchi Type-III Universe