Statefinder diagnostic in a torsion cosmology

被引：26

作者：

Li, Xin-zhou ^{[1
]}

Sun, Chang-bo ^{[1
]}

Xi, Ping ^{[1
]}

机构：

[1] Shanghai Normal Univ, Shanghai United Ctr Astrophys SUCA, Shanghai 200234, Peoples R China

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2009年 / 04期

基金：

美国国家科学基金会;

关键词：

cosmology of theories beyond the SM; gravity; POINCARE GAUGE-THEORY; DARK ENERGY; UNIVERSE; TERM; CONSTRAINTS; DYNAMICS; MODELS; SINGULARITIES; PARAMETERS; CONSTANT;

D O I：

10.1088/1475-7516/2009/04/015

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页数：18

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