Accelerated Expansion of the Universe in the Model with Non-Uniform Pressure

Abstract

We present the particular case of the Stephani solution for shear-free perfect fluid with uniform energy density and non-uniform pressure. Such models appeared as possible alternative to the consideration of the exotic forms of matter like dark energy that would cause the acceleration of the universe expansion. These models are characterised by the spatial curvature depending on time. We analyze the properties of the cosmological model obtained on the basis of exact solution of the Stephani class and adopt it to the recent observational data. The spatial geometry of the model is investigated. We show that despite possible singularities, the model can describe the current stage of the universe evolution.

References in corpus (2)

• Non-homogeneity-driven Universe acceleration
• A critical assessment of some inhomogeneous pressure Stephani models

Cited by in corpus (5)

• Quasi-homologous evolution of self-gravitating systems with vanishing complexity factor
• Hyperbolically symmetric versions of Lemaitre-Tolman-Bondi spacetimes
• Non-static hyperbolicallly symmetric fluids
• Limits on the Inferred Hubble Constant Bias from a Local McVittie Gravitational Field
• Geodesic Structure of the Accelerated Stephani Universe