19 citations · 79 across the 23 of their papers we have counts for
24 papers
New Barrow holographic dark energy: cosmological dynamics and cosmic chronometer analysis
Omid Azarakhsh, Tayeb Golanbari, Behrooz Malekolkalami +1
We formulate new Barrow holographic dark energy (NBHDE) as a second-order expansion of the Barrow entropy correction near the standard holographic dark energy (HDE) limit, adopting…
Barrow Holographic Dark Energy with a Ricci Cutoff in Power-Law Gravity: Late-Time Cosmological Dynamics
S. Tavakoli, T. Golanbari, B. Malekolkalami +1
We investigate late-time Barrow holographic dark energy (BHDE) with Ricci cutoff in gravity. The term modifies the symmetric-teleparallel geometry, whi…
Geodesics Structure and Light Deflection of Regular Phantom Black Hole
B. Malekolkalami, M. Haditale
The geodesic structure of Regular Phantom Black Holes (\textbf{RPBH}) space--time is analyzed and discussed in three asymptotically cases: Flat, de Sitter (\textbf{dS}), and Anti--…
Geodesics Structure and Thermodynamic Properties of Gaussian Black Hole in Quadratic Ricci Scaler Gravity
M. Haditale, B. Malekolkalami
The geodesic structure and thermal properties of Gaussian Black Holes (\textbf{GBH})s in modified and Einstein gravities are studied and compared. In the geodesic part, motion of a…
Viscosity of Modified AdS Black Brane
Razieh Golmoradifard, Mehdi Sadeghi, Behrooz Malekolkalami
We investigate the Einstein-Hilbert black brane solution in four-dimensional Anti-de Sitter (AdS) spacetime supplemented by a quadratic Ricci scalar term , where is…
Observational constraints on FLRW, Bianchi type I and V brane models
R. Jalalzadeh, S. Jalalzadeh, B. Malekolkalami +1
This study explores the compatibility of Covariant Extrinsic Gravity (CEG) with current cosmological observations. We employ the chi-square statistic and Markov Chain Monte Carlo (…
Magnetic Dipole and Noncommutativity
Behrooz Malekolkalami, Taimur Mohammadi
The noncommutativity concept has wide range of applications in physical and mathematical theories. Noncommutativity in the position-time coordinates concerns the microscale structu…
Thermodynamic Properties of Regular Phantom Black Hole
Maryam Haditale, Behrooz Malekolkalami
The Regular Phantom Black Holes (RPBH)s are of theoretical and observational importance, and some properties have been studied. In this work, we study some of the thermodynamical p…
The null geodesics of charged and non-charged black hole in mimetic gravity
M. Haditale, B. Malekolkalami
The null geodesics around the charged black hole spacetimes are investigated in the mimetic gravity framework when Einstein's gravity is coupled to a nonlinear electromagnetic fiel…
Probing extra dimensions through cosmological observations of dark energy
R. Jalalzadeh, S. Jalalzadeh, B. Malekolkalami
We investigate the isometrically embedded Bianchi type-V cosmology braneworld model in a -dimensional bulk space. The model provides a fluid of geometric dark energy (GDE) and u…
Structure Formation in Dark Matter Particle Production Cosmology
Z. Safari, K. Rezazadeh, B. Malekolkalami
We investigate a cosmological scenario in which the dark matter particles can be created during the evolution of the Universe. By regarding the Universe as an open thermodynamic sy…
The Power Spectrum Of Gravitational Waves in Anisotropic Universe (\emph{Bianchi type--I})
Taimur Mohammadi, Behrooz Malekolkalami
One of the predictions from simple inflation models is stochastic background of Gravitational Waves (\textbf{GW}), or literally what is called Primordial Gravitational Waves (\text…
Cosmological constraints on dark matter particle production rate
Z. Safari, B. Malekolkalami, H. Moshafi
Gravitational particle production has been investigated by using Einstein's gravitational field equations in the presence of a cosmological constant. To study the mechanism of part…
The Power Spectrum Of Gravitational Waves In Anisotropic Universe
Taimur Mohammadi, Behrooz Malekolkalami
One of the predictions from simple inflation models is a stochastic background of gravitational waves (or literally what is called the Primordial Gravitational Waves (\textbf{PGW})…
One-Dimensional Primordial Gravitational Waves In Pure Quadratic Gravity
Taimur Mohammadi, Behrooz Malekolkalami
The almost scale-invariant spectrum for the stochastic background wave (in primordial Universe) is a firm prediction of inflationary scenarios. In the present work, to study of pri…
About the Power Spectrum Of Primordial Gravitational Waves
Taimur Mohammadi, Behrooz Malekolkalami, Khabat Ghamari
The primordial gravitational waves (\textbf{PGW}) have been generated by inflationary amplification of the primordial (quantum) fluctuations. It is true that they have not been rec…
Quartic time-dependent oscillatons
A. Mahmoodzadeh, B. Malekolkalami
In this paper, we will study some properties of oscillaton, spherically symmetric object made of a real time-dependent scalar field, Using a self- interaction quartic scalar potent…
Geodesics around oscillatons made of exponential scalar field potential
Ali. Mahmoodzadeh, B. Malakolkalami
Oscillatons are spherically symmetric solutions to the Einstein Klein Gordon (EKG) equations for soliton stars made of real time dependent scalar fields. These equations are non si…
Late time acceleration in a non-commutative model of modified cosmology
B. Malekolkalami, K. Atazadeh, B. Vakili
We investigate the effects of noncommutativity between the position-position, position-momentum and momentum-momentum of a phase space corresponding to a modified cosmological mode…
Intrinsic Gravitomagnetism and Non-commutative effects
Behrooz Malekolkalami, Awat Lotfi
The two equations of motion for a test particle are compared with each other. One is in the Non commutative space involving a static rigid sphere (as a source of central force) and…
Gravitomagnetism and Non-commutative Geometry
Behrooz Malekolkalami, Mehrdad Farhoudi
Similarity between the gravitoelectromagnetism and the electromagnetism is discussed. We show that the gravitomagnetic field (similar to the magnetic field) can be equivalent to th…
Noncommutative Double Scalar Fields in FRW Cosmology as Cosmical Oscillators
Behrooz Malekolkalami, Mehrdad Farhoudi
We investigate effects of noncommutativity of phase space generated by two scalar fields conformally coupled to curvature in FRW cosmology. We restrict deformation of minisuperspac…
Noncommutativity Effects in FRW Scalar Field Cosmology
Behrooz Malekolkalami, Mehrdad Farhoudi
We study effects of noncommutativity on the phase space generated by a non-minimal scalar field which is conformally coupled to the background curvature in an isotropic and homogen…
About Gravitomagnetism
Behrooz Malekolkalami, Mehrdad Farhoudi
The gravitomagnetic field is the force exerted by a moving body on the basis of the intriguing interplay between geometry and dynamics which is the analog to the magnetic field of…