Astrophysics and Space Science

, Volume 332, Issue 2, pp 515–524

Cosmological evolution and statefinder diagnostic for new holographic dark energy model in non flat universe

  • M. Malekjani
  • A. Khodam-Mohammadi
  • N. Nazari-pooya
Original Article

DOI: 10.1007/s10509-010-0550-4

Cite this article as:
Malekjani, M., Khodam-Mohammadi, A. & Nazari-pooya, N. Astrophys Space Sci (2011) 332: 515. doi:10.1007/s10509-010-0550-4

Abstract

In this paper, the holographic dark energy model with new infrared cut-off proposed by Granda and Oliveros has been investigated in spatially non flat universe. The dependency of the evolution of equation of state, deceleration parameter and cosmological evolution of Hubble parameter on the parameters of new HDE model are calculated. Also, the statefinder parameters r and s in this model are derived and the evolutionary trajectories in sr plane are plotted. We show that the evolutionary trajectories are dependent on the model parameters of new HDE model. Eventually, in the light of SNe + BAO + OHD + CMB observational data, we plot the evolutionary trajectories in sr and qr planes for best fit values of the parameters of new HDE model.

Keywords

Dark energy New holographic model Statefinder diagnostic Cosmological evolution 

Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  • M. Malekjani
    • 1
    • 2
  • A. Khodam-Mohammadi
    • 1
  • N. Nazari-pooya
    • 1
  1. 1.Department of Physics, Faculty of ScienceBu-Ali Sina UniversityHamedanIran
  2. 2.Research Institute for Astronomy & Astrophysics of Maragha (RIAAM)MaraghaIran

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