Statefinder diagnostic in a torsion cosmology

Details Statefinder diagnostic in a torsion cosmology Statefinder diagnostic in a torsion cosmology

2009-03-27

arxiv.org/abs/0903.4724v1

JCAP 0904:015,2009

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

18 pages, 15 figures, accepted paper in JCAP

Scientific paper

10.1088/1475-7516/2009/04/015

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.

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