Geometrical Diagnostics for Generalized Chaplygin Gas
Astrophysics
2010-11-02 v3 Cosmology and Nongalactic Astrophysics
Abstract
A new diagnostic method, is applied to generalized Chaplygin gas (GCG) model as the unification of dark matter and dark energy. On the basis of the recently observed data: the Union supernovae, the observational Hubble data, the SDSS baryon acoustic peak and the five-year WMAP shift parameter, we show the discriminations between GCG and CDM model. Furthermore, it is calculated that the current equation of state of dark energy according to GCG model.
Cite
@article{arxiv.0812.2074,
title = {Geometrical Diagnostics for Generalized Chaplygin Gas},
author = {Jianbo Lu and Lixin Xu},
journal= {arXiv preprint arXiv:0812.2074},
year = {2010}
}