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- Research Institute for Astronomy and Astrophysics of MaraghIR261 papers
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8 papers · 2 filters
New asymptotically flat phantom wormhole solutions
Francisco S. N. Lobo, Foad Parsaei, Nematollah Riazi
A possible cause of the late-time cosmic acceleration is an exotic fluid with an equation of state lying within the phantom regime, i.e., . The latter violates the null e…
Eguchi-Hanson like space-times in F(R) gravity
S. H. Hendi, R. B. Mann, N. Riazi +1
We consider a model of gravity in which exponential and power corrections to Einstein- gravity are included. We show that this model has 4-dimensional Eguchi-Hanson type…
Statefinder diagnostic of logarithmic entropy corrected holographic dark energy with Granda-Oliveros IR cut-off
A. Khodam-Mohammadi, Antonio Pasqua, M. Malekjani +2
In this work, we have studied the logarithmic entropy corrected holographic dark energy (LECHDE) model with Granda-Oliveros (G-O) IR cutoff. The evolution of dark energy (DE) densi…
Generalized ghost dark energy in Brans-Dicke theory
A. Sheykhi, E. Ebrahimi, Y. Yosefi
It was argued that the vacuum energy of the Veneziano ghost field of QCD, in a time-dependent background, can be written in the general form, , where is the Hubble…
Interacting generalized ghost dark energy in non-flat universe
Esmaeil Ebrahimi, Ahmad Sheykhi, Hamzeh Alavirad
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 d…
Higher dimensional charged BTZ-like wormhole
S. H. Hendi
It is known that traversable wormhole can exist in General Relativity only if its throat contains some exotic matter. In this paper, we obtain -dimensional (horizonless) cha…