Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2012-02-19
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
23 pages, 6 figures
Scientific paper
A new model of dark energy namely "ghost dark energy model" has recently been suggested to interpret the positive acceleration of cosmic expansion. The energy density of ghost dark energy is proportional to the hubble parameter. In this paper we perform the statefinder diagnostic tool for this model both in flat and non-flat universe. We discuss the dependency of the evolutionary trajectories in $s-r$ and $q-r$ planes on the interaction parameter between dark matter and dark energy as well as the spatial curvature parameter of the universe. Eventually, in the light of SNe+BAO+OHD+CMB observational data, we plot the evolutionary trajectories in $s-r$ and $q-r$ planes for the best fit values of the cosmological parameters and compare the interacting ghost model with other dynamical dark energy models. We show that the evolutionary trajectory of ghost dark energy in statefinder diagram is similar to holographic dark energy model. It has been shown that the statefinder location of $\Lambda$CDM is in good agreement with observation and therefore the dark energy models whose current statefinder values are far from the $\Lambda$CDM point can be ruled out.
Khodam-Mohammadi A.
Malekjani M.
No associations
LandOfFree
Statefinder diagnosis and the interacting ghost model of dark energy does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Statefinder diagnosis and the interacting ghost model of dark energy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Statefinder diagnosis and the interacting ghost model of dark energy will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-419470