Abstract
We generalize the holographic dark energy model described in Hubble length IR cutoff by assuming a slowly time varying function for holographic parameter c 2. We calculate the evolution of EoS parameter and the deceleration parameter as well as the evolution of dark energy density parameter of the model in flat FRW universe. We show that in this model the phantom line is crossed from quintessence regime to phantom regime which is in agreement with observation. The evolution of deceleration parameter of the model indicates the transition from decelerated to accelerated expansion consistently with observation. Eventually, we show that the holographic dark energy model with Hubble horizon IR cutoff can interpret the pressureless dark matter era at the early time and dark energy dominated phase later. The singularity of the model is also calculated.
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This work has been supported financially by Research Institute for Astronomy & Astrophysics of Maragha (RIAAM) under research project 1/2782-53.
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Malekjani, M. Generalized holographic dark energy model in the Hubble length. Astrophys Space Sci 347, 405–410 (2013). https://doi.org/10.1007/s10509-013-1522-2
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DOI: https://doi.org/10.1007/s10509-013-1522-2