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Journal
2013 | 11 | 7 | 949-960
Article title

Interacting generalized ghost dark energy in a non-flat universe

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Abstracts
EN
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/ρ, 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 → −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.
Publisher

Journal
Year
Volume
11
Issue
7
Pages
949-960
Physical description
Dates
published
1 - 7 - 2013
online
17 - 10 - 2013
Contributors
  • Institute for Theoretical Physics, Karlsruhe Institute of Technology (KIT), 76128, Karlsruhe, Germany, hamzeh.alavirad@kit.edu
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YADDA identifier
bwmeta1.element.-psjd-doi-10_2478_s11534-013-0253-x
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