Work

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

Year: 2003

Type: article

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 $p=\ensuremath{-}A/{\ensuremath{\rho}}^{\ensuremath{\alpha}}$ is also analyzed in terms of the statefinder parameters.

Source: Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields

DOI: 10.1103/physrevd.67.063509

Authors: Vittorio Gorini, Alexander Kamenshchik, Ugo Moschella

Institutions: University of Insubria, Istituto Nazionale di Fisica Nucleare, Sezione di Milano, Russian Academy of Sciences, Landau Institute for Theoretical Physics

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Russian Foundation for Basic Research, Università degli Studi dell'Insubria

Award: G4712171512