Observational constraints on a unified dark matter and dark energy model based on generalized Chaplygin gas

Abstract

We study a generalized version of Chaplygin gas as unified model of dark matter and dark energy. Using realistic theoretical models and the currently available observational data from the age of the universe, the expansion history based on the type Ia supernovae, the matter power spectrum, the cosmic microwave background radiation anisotropy power spectra, and the perturbation growth factor we put the unified model under observational test. As the model has only two free parameters in the flat Friedmann background [$\Lambda$CDM (cold dark matter) model has only one free parameter] we show that the model is already tightly constrained by currently available observations. The only parameter space extremely close to the $\Lambda$CDM model is allowed in this unified model.

7 pages, 9 figures

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Cited by in corpus (33)

• Cosmology and Fundamental Physics with the Euclid Satellite
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• Cosmological constraints on a decomposed Chaplygin gas
• Inhomogeneous vacuum energy
• Constraints on dissipative unified dark matter
• Post-$Planck$ constraints on interacting vacuum energy
• An evaluation of cosmological models from expansion and growth of structure measurements
• Intermediate-Generalized Chaplygin Gas inflationary universe model
• Does Chaplygin gas have salvation?
• Unified Dark Fluid with Constant Adiabatic Sound Speed and Cosmic Constraints
• Matter power spectrum for the generalized Chaplygin gas model: The relativistic case
• Observational constraints on new generalized Chaplygin gas model
• Horava-Lifshitz cosmology with generalized Chaplygin gas
• Constraints on a decomposed dark fluid with constant adiabatic sound speed by jointing the geometry test and growth rate after Planck data
• Nonparametric reconstruction of the Om diagnostic to test LCDM
• Unified Dark Fluid with Constant Adiabatic Sound Speed: Including Entropic Perturbations
• Thawing models in the presence of a generalized Chaplygin gas
• Observational constraints of the gravitational waves in the Brans-Dicke theory: Einstein frame and Jordan-Brans-Dicke frame
• Warm intermediate inflationary Universe model in the presence of a Generalized Chaplygin Gas
• Constraints on the Generalized Chaplygin Gas Model from Gamma-Ray Bursts
• Generalized models of unification of dark matter and dark energy
• Constraints on a $f(R)$ gravity dark energy model with early scaling evolution
• A note on observational signatures in superluminal unified dark matter models
• Is interacting vacuum viable?
• Unified dark fluid with fast transition: including entropic perturbations
• Inhomogeneous and interacting vacuum energy
• Dark energy effects on realistic neutron stars
• Unified dark matter: constraints from galaxies and clusters
• Varying Alpha Generalized Dirac-Born-Infeld Models
• Dark radiation from a unified dark fluid model
• Chaplygin gas halos