1.

More on the NonGaussianity of Perturbations in a Nonminimal Inflationary Model
/ Nozari, K. ; Shojaee, R. ; Darabi, F.
We study nonlinear cosmological perturbations and their possible nonGaussian character in an extended nonminimal inflation where gravity is coupled nonminimally to both the scalar field and its derivatives. [...]
Published in Advances in High Energy Physics 2018 (2018) 2343896
10.1155/2018/2343896
arXiv:1808.04259
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2.

Surrounded Vaidya solution by cosmological fields
/ Heydarzade, Y. ; Darabi, F.
In the present work, we study the general surrounded Vaidya solution by the various cosmological fields and its nature describing the possibility of the formation of naked singularities or black holes. [...]
Published in EPJC 78 (2018) 582
10.1140/epjc/s1005201860414
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3.

Noncritical anisotropic Bianchi type I string cosmology with ${\alpha}^{\prime}$ corrections
/ Naderi, F. ; RezaeiAghdam, A. ; Darabi, F.
We present noncritical Bianchi type I string cosmology solutions in the presence of central charge deficit term $\Lambda $. [...]
Published in Physical Review D 98 (2018)
10.1103/PhysRevD.98.026009
arXiv:1712.03581
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4.

Surrounded Vaidya black holes: apparent horizon properties
/ Heydarzade, Y. ; Darabi, F.
We study the thermodynamical features and dynamical evolutions of various apparent horizons associated with the Vaidya evaporating black hole surrounded by the cosmological fields of dust, radiation, quintessence, cosmological constantlike and phantom. [...]
Published in EPJC 78 (2018) 342
10.1140/epjc/s1005201858429
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5.

Emergent cosmos in Einstein–Cartan theory
/ Hadi, H. ; Heydarzade, Y. ; Hashemi, M. ; Darabi, F.
Based on Padmanabhan’s proposal, the accelerated expansion of the universe can be driven by the difference between the surface and bulk degrees of freedom in a region of space, described by the relation dV/dt=NsurNbulk where Nsur and Nbulk=Nem+Nde are the degrees of freedom assigned to the surface area and the matter–energy content inside the bulk such that the indices “em” and “de” represent energymomentum and dark energy, respectively. [...]
Published in EPJC 78 (2018) 38
10.1140/epjc/s1005201754941
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6.

Einstein and Rastall theories of gravitation in comparison
/ Darabi, F. ; Moradpour, H. ; Licata, I. ; Heydarzade, Y. ; et al
We profit by a recent paper of Visser claiming that Rastall gravity is equivalent to Einstein gravity to compare the two gravitational theories in a general way. [...]
Published in EPJC 78 (2018) 25
10.1140/epjc/s1005201755025
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7.

Braneworld black holes and entropy bounds
/ Heydarzade, Y. ; Hadi, H. ; Corda, C. ; Darabi, F.
The Bousso's D bound entropy for the various possible black hole solutions on a 4dimensional brane is checked. [...]
Published in Physics letters B (2017)
10.1016/j.physletb.2017.11.061
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8.

Vaidya spacetime in massive gravity's rainbow
/ Heydarzade, Yaghoub ; Rudra, Prabir ; Darabi, Farhad ; Ali, Ahmed Farag ; et al
In this paper, we will analyze the energy dependent deformation of massive gravity using the formalism of massive gravity's rainbow. [...]
Published in Physics letters B (2017)
10.1016/j.physletb.2017.09.049
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9.

Evolution of spherical overdensities in tachyon scalar field model
/ Setare, M.R. ; Felegary, F. ; Darabi, F.
We study the tachyon scalar field model in flat FRW cosmology with the particular potential ϕ−2 and the scale factor behavior a(t)=tn . [...]
Published in Physics letters B (2017)
10.1016/j.physletb.2017.06.039
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10.

Black hole solutions surrounded by perfect fluid in Rastall theory
/ Heydarzade, Y. ; Darabi, F.
In this work, we obtain uncharged∖charged Kiselevlike black holes as a new class of black hole solutions surrounded by perfect fluid in the context of Rastall theory. [...]
Published in Physics letters B (2017)
10.1016/j.physletb.2017.05.064
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