Interacting Ghost Dark Energy in Non-Flat Universe

Abstract

A new dark energy model called "ghost dark energy" was recently suggested to explain the observed accelerating expansion of the universe. This model originates from the Veneziano ghost of QCD. The dark energy density is proportional to Hubble parameter, ${\rho }_D=\alpha H$, where $\alpha$ is a constant of order ${\Lambda }_{\mathrm{QCD}}^3$ and ${\Lambda }_{\mathrm{QCD}}\sim 100MeV$ is QCD mass scale. In this paper, we extend the ghost dark energy model to the universe with spatial curvature in the presence of interaction between dark matter and dark energy. We study cosmological implications of this model in detail. In the absence of interaction the equation of state parameter of ghost dark energy is always $w_D>-1$ and mimics a cosmological constant in the late time, while it is possible to have $w_D<-1$ provided the interaction is taken into account. When $k=0$, all previous results of ghost dark energy in flat universe are recovered. To check the observational consistency, we use Supernova type Ia (SNIa) Gold sample, shift parameter of Cosmic Microwave Background radiation (CMB) and the Baryonic Acoustic Oscillation peak from Sloan Digital Sky Survey (SDSS). The best fit values of free parameter at $1\sigma$ confidence interval are: ${\Omega }_m^0=0.35_{-0.03}^{+0.02}$, ${\Omega }_D^0=0.75_{-0.04}^{+0.01}$ and $b^2=0.08_{-0.03}^{+0.03}$. Consequently the total energy density of universe at present time in this model at 68% level equates to ${\Omega }_{\mathrm{tot}}^0=1.10_{-0.05}^{+0.02}$.

19 pages, 9 figures. V2: Added comments, observational consequences, references, figures and major corrections. Accepted for publication in General Relativity and Gravitation

References in corpus (17)

• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Dynamics of dark energy
• New Hubble Space Telescope Discoveries of Type Ia Supernovae at z > 1: Narrowing Constraints on the Early Behavior of Dark Energy
• Cosmological parameters from combining the Lyman-alpha forest with CMB, galaxy clustering and SN constraints
• A Dark Energy Model Characterized by the Age of the Universe
• A New Model of Agegraphic Dark Energy
• Dark Energy and QCD Ghost
• Holographic dark energy in Brans-Dicke theory
• Improved Constraints on the Acceleration History of the Universe and the Properties of the Dark Energy
• The cosmological constant from the ghost. A toy model
• Interacting holographic dark energy in Brans-Dicke theory
• Interacting agegraphic dark energy models in non-flat universe
• Consistency of $f(R)=\sqrt{R^2-R_0^2}$ Gravity with the Cosmological Observations in Palatini Formalism
• String inspired explanation for the super-acceleration of our universe
• Power-law Parameterized Quintessence Model
• Observational tests of a two parameter power-law class modified gravity in Palatini formalism
• Observational constraints on the braneworld model with brane-bulk energy exchange

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