68 citations · 1.1k across the 49 of their papers we have counts for
26 papers · 1 filter
Cosmological constrains on minimally and non-minimally coupled scalar field models
Zahra Davari, Valerio Marra, Mohammad Malekjani
We study the minimally and non-minimally coupled scalar field models as possible alternatives for dark energy, the mysterious energy component that is driving the accelerated expan…
Can dark energy be expressed as a power series of the Hubble parameter?
Mehdi Rezaei, Mohammad Malekjani, Joan Sola
In this work we examine the possibility that the dark energy (DE) density, can be dynamical and appear as a power series expansion of the Hubble rate (and its derivatives)…
Can Holographic dark energy models fit the observational data?
Mohammad Malekjani, Mehdi Rezaei, Iman A. Akhlaghi
In this work we investigate the holographic dark energy models with slowly time-varying model parameter defined based on the current Hubble horizon length scale. While the previous…
New parameterization for unified dark matter and dark energy
Zahra Davari, Mohammad Malekjani, Michal Artymowski
In this paper we investigate a new phenomenological parameterization for unified dark matter and dark energy based on the polynomial expansion of the barotropic equation of state p…
Model selection and constraints from Holographic dark energy scenarios
I. A. Akhlaghi, M. Malekjani, S. Basilakos +1
In this study we combine the expansion and the growth data in order to investigate the ability of the three most popular holographic dark energy models, namely event future horizon…
Spherical collapse model and cluster number counts in power law gravity
Mohammad Malekjani, Spyros Basilakos, Neda Heidari
We study the spherical collapse model (SCM) in the framework of spatially flat power law gravity model. We find that the linear and non-linear growth of sph…
Growth of spherical overdensities in scalar-tensor cosmologies
N. Nazari-Pooya, M. Malekjani, F. Pace +1
The accelerated expansion of the universe is a rather established fact in cosmology and many different models have been proposed as a viable explanation. Many of these models are b…
Effects of ghost dark energy perturbations on the evolution of spherical overdensities
Mohammad Malekjani, Tayebe Naderi, Francesco Pace
While in the standard cosmological model the accelerated expansion of the Universe is explained by invoking the presence of the cosmological constant term, it is still unclear the…
Evolution of spherical overdensities in holographic dark energy models
Tayebe Naderi, Mohammad Malekjani, Francesco Pace
In this work we investigate the spherical collapse model in flat FRW dark energy universes. We consider the Holographic Dark Energy (HDE) model as a dynamical dark energy scenario…
Spherical collapse and the holographic dark energy model
Tayebe Naderi, Mohammad Malekjani
In this work we investigate the spherical collapse model in flat FRW universe containing dark energy component. We consider the Holographic Dark Energy (HDE) model as a dynamical d…
G-corrected holographic dark energy model
M. Malekjani, M. Honari-Jafarpour
Here we investigate the holographic dark energy model in the framework of FRW cosmology where the Newtonian gravitational constant,, is varying with cosmic time. Using the compl…
Cosmography of interacting generalized QCD ghost dark energy
Mohammad Malekjani
Exploring the accelerated expansion of the universe, we investigate the generalized ghost dark energy (GGDE) model from the statefinder diagnosis analysis in a flat FRW universe. F…
Holographic dark energy with time varying parameter
M. Malekjani, R. Zarei, M. Honari-Jafarpour
We consider the holographic dark energy model in which the model parameter evolves slowly with time. First we calculate the evolution of EoS parameter as well as the decelera…
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 holographic dark energy model described at the Hubble length
M. Malekjani
We generalize the holographic dark energy model described in Hubble length IR cutoff by assuming a slowly time varying function for holographic parameter . We calculate the ev…
Polytropic gas scalar field models of dark energy
Mohammad Malekjani
In this work we investigate the polytropic gas dark energy model in the non flat universe. We first calculate the evolution of EoS parameter of the model as well as the cosmologica…
Statefinder diagnostic and analysis for interacting polytropic gas dark energy model
M. Malekjani, A. Khodam-Mohammadi
The interacting polytropic gas dark energy model is investigated from the viewpoint of statefinder diagnostic tool and analysis. The dependency of the statefinder pa…
Generalized Chaplygin gas model: Cosmological consequences and statefinder diagnosis
M. Malekjani, A. Khodam-Mohammadi, N. Nazari-Pooya
The generalized Chaplygin gas (GCG) model in spatially flat universe is investigated. The cosmological consequences led by GCG model including the evolution of EoS parameter, decel…
Interacting entropy-corrected holographic dark energy with apparent horizon as an infrared cutoff
A. Khodam-Mohammadi, M. Malekjani
In this work we consider the entropy-corrected version of interacting holographic dark energy (HDE), in the non-flat universe enclosed by apparent horizon. Two corrections of entro…
Cosmological implications of interacting polytropic gas dark energy model in non-flat universe
M. Malekjani, A. Khodam-Mohammadi, M. Taji
The polytropic gas model is investigated as an interacting dark energy scenario. The cosmological implications of the model including the evolution of EoS parameter , energy d…
Cosmological evolution and statefinder diagnostic for new holographic dark energy model in non flat universe
M. Malekjani, A. Khodam-Mohammadi, N. Nazari-pooya
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 t…
New holographic Chaplygin gas model of dark energy
M. Malekjani, A. Khodam-Mohammadi
In this work, we investigate the holographic dark energy model with new infrared cut-off (new HDE model) proposed by Granda and Oliveros. Using this new definition for infrared cut…
Interacting entropy-corrected agegraphic Chaplygin gas model of dark energy
M. Malekjani, A. Khodam-Mohammadi
In this work, we consider the interacting agegraphic dark energy models with entropy correction terms due to loop quantum gravity. We study the correspondence between the Chaplygin…
Interacting entropy-corrected holographic scalar field models in non-flat universe
A. Khodam-Mohammadi, M. Malekjani
In this work we establish a correspondence between the tachyon, K-essence and dilaton scalar field models with the interacting entropy-corrected holographic dark (ECHD) model in no…