Isotropization in the approach to big rip singularities for Cardassian models

Berndt, Nikolaus; Rendall, Alan D.

doi:10.1088/0264-9381/25/14/145007

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

Isotropization in the approach to big rip singularities for Cardassian models

MPS-Authors

Rendall, Alan D.
Geometric Analysis and Gravitation, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

External Resource

No external resources are shared

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

cqg8_14_145007.pdf
(Publisher version), 159KB

Supplementary Material (public)

There is no public supplementary material available

Citation

Berndt, N., & Rendall, A. D. (2008). Isotropization in the approach to big rip singularities for Cardassian models. Classical and Quantum Gravity, 25(14): 145007. doi:10.1088/0264-9381/25/14/145007.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0013-6296-D

Abstract

Cardassian models are an alternative to general relativity which have been proposed as an approach to explaining accelerated cosmic expansion while avoiding directly introducing dark energy. They are generally formulated only in the homogeneous and isotropic case. In this paper an extension of the usual formulation to general spatially homogeneous geometries is given. A characteristic feature of many classes of Cardassian models is the occurrence of big rip singularities where the scale factor tends to infinity after a finite time. It is shown that big rip singularities are also widespread in more general homogeneous cases. It is also shown that there is isotropization in the approach to a big rip singularity which bears a strong resemblance to the late-time isotropization observed in cosmological spacetimes which accelerate forever in the future.