Stephani Cosmology: Entropically Viable But Observationally Challenged
General Relativity and Quantum Cosmology
2018-06-01 v2 Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory
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.
Keywords
Cite
@article{arxiv.1712.02297,
title = {Stephani Cosmology: Entropically Viable But Observationally Challenged},
author = {Yen Chin Ong and S. Sedigheh Hashemi and Rui An and Bin Wang},
journal= {arXiv preprint arXiv:1712.02297},
year = {2018}
}
Comments
Discussion on observational constraints elaborated. Version accepted by EPJC