Abstract
In this paper two cosmological models representing the flat Friedmann universe filled with a Chaplygin fluid, with or without dust, are analyzed in terms of the recently proposed “statefinder” parameters. Trajectories of both models in the parameter plane are shown to be significantly different with respect to the “quiessence” and “tracker” models. The generalized Chaplygin gas model with an equation of state of the form is also analyzed in terms of the statefinder parameters.
- Received 4 October 2002
DOI:https://doi.org/10.1103/PhysRevD.67.063509
©2003 American Physical Society