Cosmology with a Variable Chaplygin Gas
Astrophysics
2008-11-26 v3 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Abstract
We consider a new generalized Chaplygin gas model that includes the original Chaplygin gas model as a special case. In such a model the generalized Chaplygin gas evolves as from dust to quiessence or phantom. We show that the background evolution for the model is equivalent to that for a coupled dark energy model with dark matter. The constraints from the current type Ia supernova data favour a phantom-like Chaplygin gas model.
Cite
@article{arxiv.astro-ph/0506091,
title = {Cosmology with a Variable Chaplygin Gas},
author = {Zong-Kuan Guo and Yuan-Zhong Zhang},
journal= {arXiv preprint arXiv:astro-ph/0506091},
year = {2008}
}
Comments
8 pages, 3 figures, LaTeX2e, Accepted for publication in Phys. Lett. B