Can the Chaplygin gas be a plausible model for dark energy?

Abstract

In this note 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 w.r.t. "quiessence" and "tracker" models. The generalized Chaplygin gas model with an equation of state of the form $p=-A/{\rho }^{\alpha }$ is also analyzed in terms of the statefinder parameters.

6 pages, 2 figures

References in corpus (5)

• Cosmological consequences of a Chaplygin gas dark energy
• High-redshift objects and the generalized Chaplygin gas
• Alternatives to Quintessence Model Building
• Dark Matter, Dark Energy and the Chaplygin Gas
• Fitting the Supernova Type Ia Data with the Chaplygin Gas

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