Cosmology with a variable Chaplygin gas

2005/06/30 by Zong-Kuan Guo, Zong‐Kuan Guo, Yuan‐Zhong Zhang +1 · 1 citation
Mathematics · Physics and Astronomy · #Astrophysics #Black Holes and Theoretical Physics #Chaplygin gas #Classical mechanics #Cosmology #Cosmology and Gravitation Theories #Dark energy #Dark matter #Galaxies: Formation, Evolution, Phenomena #Imaging phantom #Mathematical analysis #Mathematical physics #Mathematics #Physics #Supernova #Theoretical physics #Variable (mathematics) #astro-ph #gr-qc #hep-ph

paper · pdf · doi:10.1016/j.physletb.2006.12.063

published as Phys.Lett.B645:326-329,2007 · 8 pages, 3 figures, LaTeX2e, Accepted for publication in Phys. Lett. B

arxiv created 2007/01/09 · openalex publication_date 2007/01/11 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

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 quiescence 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.

Citations

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Cited by

• Decaying vacuum energy, matter creation and cosmic acceleration