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2013 | 11 | 7 | 949-960
Tytuł artykułu

Interacting generalized ghost dark energy in a non-flat universe

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
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.
Słowa kluczowe
Wydawca

Czasopismo
Rocznik
Tom
11
Numer
7
Strony
949-960
Opis fizyczny
Daty
wydano
2013-07-01
online
2013-10-17
Twórcy
  • Institute for Theoretical Physics, Karlsruhe Institute of Technology (KIT), 76128, Karlsruhe, Germany, hamzeh.alavirad@kit.edu
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