Cosmology with a Variable Chaplygin Gas

Details Cosmology with a Variable Chaplygin Gas Cosmology with a Variable Chaplygin Gas

2005-06-04

arxiv.org/abs/astro-ph/0506091v3

Phys.Lett.B645:326-329,2007

Astronomy and Astrophysics

Astrophysics

8 pages, 3 figures, LaTeX2e, Accepted for publication in Phys. Lett. B

Scientific paper

10.1016/j.physletb.2006.12.063

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.

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