Interacting generalized ghost dark energy in non-flat universe

Abstract

We investigate the generalized Quantum Chromodynamics (QCD) ghost model of dark energy in the framework of Einstein gravity. First, we study the non-interacting generalized ghost dark energy in a flat Friedmann-Robertson-Walker (FRW) background. We obtain the equation of state parameter, $w_D=p/\rho$, the deceleration parameter, and the evolution equation of the generalized ghost dark energy. We find that, in this case, $w_D$ cannot cross the phantom line ($w_D>-1$) and eventually the universe approaches a de-Sitter phase of expansion $(w_D\to -1)$. Then, we extend the study to the interacting ghost dark energy in both a flat and non-flat FRW universe. We find that the equation of state parameter of the interacting generalized ghost dark energy can cross the phantom line ($w_D<-1$) provided the parameters of the model are chosen suitably. Finally, we constrain the model parameters by using the Markov Chain Monte Carlo (MCMC) method and a combined dataset of SNIa, CMB, BAO and X-ray gas mass fraction.

14 Pages, 10figures

References in corpus (27)

• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Dynamics of dark energy
• Spectra and Light Curves of Six Type Ia Supernovae at 0.511 < z < 1.12 and the Union2 Compilation
• Dark Energy
• Cosmological parameters from combining the Lyman-alpha forest with CMB, galaxy clustering and SN constraints
• Dark Energy-Dark Matter Interaction and putative violation of the Equivalence Principle from the Abell Cluster A586
• Dynamics of dark energy with a coupling to dark matter
• Dark Energy and QCD Ghost
• Improved Constraints on the Acceleration History of the Universe and the Properties of the Dark Energy
• Toward a solution of the coincidence problem
• Interacting holographic dark energy in Brans-Dicke theory
• Matter density perturbations in interacting quintessence models
• Interacting agegraphic dark energy models in non-flat universe
• Instability of QCD ghost dark energy model
• Interacting Ghost Dark Energy in Non-Flat Universe
• Dynamics of interacting dark energy model in Einstein and Loop Quantum Cosmology
• Interacting HDE and NADE in Brans-Dicke Chameleon Cosmology
• Quintessence Ghost Dark Energy Model
• Early dark energy from zero-point quantum fluctuations
• Interacting Ghost Dark Energy in Brans-Dicke Theory
• Kinetic k-essence ghost dark energy model
• Interacting entropy-corrected agegraphic-tachyon dark energy
• Interacting entropy-corrected new agegraphic dark energy in Brans-Dicke cosmology
• Tachyon Reconstruction of Ghost Dark Energy
• Latest Observational Constraints to the Ghost Dark Energy Model by Using Markov Chain Monte Carlo Approach
• Reconstruction of modified gravity with ghost dark energy models
• Late-time acceleration and Phantom Divide Line Crossing with Non-minimal Coupling and Lorentz Invariance Violation

Cited by in corpus (5)

• Analysis of Generalized Ghost Version of Pilgrim Dark Energy
• Analysis of Generalized Ghost Pilgrim Dark Energy in Non-flat FRW Universe
• Thermodynamical description of the ghost dark energy model
• Consistency of nonlinear interacting ghost dark energy with recent observations
• Generalized Ghost Pilgrim Dark Energy Fractal Cosmology with Observational Constraint