Are Chaplygin gases serious contenders to the dark energy throne?

Abstract

We study the implications on both background and perturbation evolution of introducing a Chaplygin gas component in the universe's ingredients. We perform likelihood analyses using wide-ranging, SN1a, CMB and large scale structure observations to assess whether such a component could be a genuine alternative to a cosmological constant. We find that current data favors an adiabatic Chaplygin gas with behavior akin to a cosmological constant.

Replaced with published version: 8 pages, 7 figures

References in corpus (4)

• The Cosmological Constant and Dark Energy
• Can the Chaplygin gas be a plausible model for dark energy?
• Generalized Chaplygin gas and CMBR constraints
• Alternatives to Quintessence Model Building

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