Cosmography of interacting generalized QCD ghost dark energy

Abstract

Exploring the accelerated expansion of the universe, we investigate the generalized ghost dark energy (GGDE) model from the statefinder diagnosis analysis in a flat FRW universe. First we calculate the cosmological evolution and statefinder trajectories for non-interacting case and then extend this work by considering the interaction between dark matter and dark energy components. We show that in the non-interacting case the phantom line can not be crossed and also he evolutionary trajectories of model in $s-r$ plane can not be discriminated. It has been shown that the present location of model in $s-r$ plane would be close to observational value for negative values of model parameter. In the presence of interaction between dark matter and dark energy, the phantom regime is achieved, the accelerated phase of expansion occurs sooner compare with non-interacting case. The GGDE model is also discussed from the viewpoint of perturbation theory by calculating the adiabatic sound speed of the model. Finally, unlike the non-interacting case, the evolutionary trajectories in $s-r$ plane can be discriminated in the interacting model. Like non-interacting model, in the interacting case the present location of GGDE model is closer to observational value for negative values of model parameter.

20 pages, 8 figures

References in corpus (29)

• Dynamics of dark energy
• Dark energy cosmology: the equivalent description via different theoretical models and cosmography tests
• A New Model of Agegraphic Dark Energy
• 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
• The holographic dark energy in non-flat Brans-Dicke cosmology
• Interacting holographic dark energy model in non-flat universe
• Interacting holographic generalized Chaplygin gas model
• Interacting Holographic Phantom
• Dark Energy and QCD Ghost
• Instability of holographic dark energy models
• Holographic tachyon model of dark energy
• Instability of agegraphic dark energy models
• The cosmological constant from the ghost. A toy model
• Toward a solution of the coincidence problem
• Matter density perturbations in interacting quintessence models
• Interacting agegraphic dark energy models in non-flat universe
• More on QCD Ghost Dark Energy
• Dynamics of interacting dark energy model in Einstein and Loop Quantum Cosmology
• From confinement to dark energy
• Topological Susceptibility and Contact Term in QCD. A Toy Model
• The Gauge Fields and Ghosts in Rindler Space
• Cosmic Behavior, Statefinder Diagnostic and $w-w^{\prime }$ Analysis for Interacting NADE model in Non-flat Universe
• Statefinder diagnostic and $w-w^{\prime }$ analysis for interacting polytropic gas dark energy model
• Reconstruction of modified gravity with ghost dark energy models
• Statefinder diagnosis and the interacting ghost model of dark energy
• Generalized Chaplygin gas model: Cosmological consequences and statefinder diagnosis
• Two Component Baryonic-Dark Matter Structure Formation in Top-Hat Model
• G-corrected holographic dark energy model

Cited by in corpus (4)

• Cosmographic analysis of the equation of state of the universe through Padé approximations
• Analysis of Generalized Ghost Version of Pilgrim Dark Energy
• Analysis of Generalized Ghost Pilgrim Dark Energy in Non-flat FRW Universe
• Cosmological Analysis of Reconstructed $\mathcal{F}(T,T_{\mathcal{G}})$ Models