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

Vittorio Gorini, Alexander Kamenshchik, and Ugo Moschella
Phys. Rev. D 67, 063509 – Published 26 March 2003
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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=A/ρα 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

Authors & Affiliations

Vittorio Gorini

  • Dipartimento di Scienze Matematiche, Fisiche e Chimiche, Università dell’Insubria, Via Valleggio 11, 22100 Como, Italy
  • INFN Sezione di Milano, Milano, Italy

Alexander Kamenshchik

  • Dipartimento di Scienze Matematiche, Fisiche e Chimiche, Università dell’Insubria, Via Valleggio 11, 22100 Como, Italy
  • L. D. Landau Institute for Theoretical Physics of Russian Academy of Sciences, Kosygin Street 2, 117334, Moscow, Russia

Ugo Moschella

  • Dipartimento di Scienze Matematiche, Fisiche e Chimiche, Università dell’Insubria, Via Valleggio 11, 22100 Como, Italy
  • INFN Sezione di Milano, Milano, Italy

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Vol. 67, Iss. 6 — 15 March 2003

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