Statefinder diagnostic in a torsion cosmology

We apply the statefinder diagnostic to the torsion cosmology, in which an accounting for the accelerated universe is considered in term of a Riemann-Cartan geometry: dynamic scalar torsion. We find that there are some typical characteristic of the evolution of statefinder parameters for the torsion...

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Bibliographic Details
Published in:arXiv.org 2009-03
Main Authors: Xin-zhou, Li, Chang-bo, Sun, Xi, Ping
Format: Article
Language:English
Subjects:
Astronomical models
Cosmology
Critical point
Diagnostic systems
Parameters
Supernovae
Torsion
Universe
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Summary:We apply the statefinder diagnostic to the torsion cosmology, in which an accounting for the accelerated universe is considered in term of a Riemann-Cartan geometry: dynamic scalar torsion. We find that there are some typical characteristic of the evolution of statefinder parameters for the torsion cosmology that can be distinguished from the other cosmological models. Furthermore, we also show that statefinder diagnostic has a direct bearing on the critical points. The statefinder diagnostic divides the torsion parameter \(a_1\) into differential ranges, which is in keeping with the requirement of dynamical analysis. In addition, we fit the scalar torsion model to ESSENCE supernovae data and give the best fit values of the model parameters.
ISSN:2331-8422
DOI:10.48550/arxiv.0903.4724