Stephani Cosmology: Entropically Viable But Observationally Challenged
arXiv:1712.02297 · doi:10.1140/epjc/s10052-018-5866-1
Abstract
Inhomogeneous cosmological models such as the Stephani universes could, in principle, provide an explanation for the observed accelerated expansion of the Universe. Working with a concrete, popular model of the Stephani cosmology -- the Stephani-Dabrowski model, we found that it is entropically viable. We also comment on the energy conditions and the two-sheeted geometry of the spacetime. However, similar to the LTB models, despite satisfying the holographic principle, Stephani cosmology has difficulty satisfying all the constraints from observations.
Discussion on observational constraints elaborated. Version accepted by EPJC
References in corpus (17)
- Spectra and Light Curves of Six Type Ia Supernovae at 0.511 < z < 1.12 and the Union2 Compilation
- A general test of the Copernican Principle
- Time drift of cosmological redshifts as a test of the Copernican principle
- On cosmological observables in a swiss-cheese universe
- A Test of the Copernican Principle
- CMB anisotropies seen by an off-center observer in a spherically symmetric inhomogeneous universe
- What is dust? - Physical foundations of the averaging problem in cosmology
- Testing the Void against Cosmological data: fitting CMB, BAO, SN and H0
- Precision cosmology defeats void models for acceleration
- Cosmological apparent and trapping horizons
- Probing spatial homogeneity with LTB models: a detailed discussion
- Cosmological acceleration from structure formation
- Non-homogeneity-driven Universe acceleration
- An upper bound on the number of e-foldings
- A critical assessment of some inhomogeneous pressure Stephani models
- Causal structures in cosmology
- Inhomogeneous Cosmology Redux
Cited by in corpus (6)
- Accelerated Expansion of the Universe in the Model with Non-Uniform Pressure
- Analytical solutions for two inhomogeneous cosmological models with energy flow and dynamical curvature
- Accelerated expansion of the universe from the perspective of inhomogeneous cosmology
- Holographic Principle and the Second Law in Stephani Cosmology Revisited
- Limits on the Inferred Hubble Constant Bias from a Local McVittie Gravitational Field
- Geodesic Structure of the Accelerated Stephani Universe