34 citations · 296 across the 22 of their papers we have counts for
22 papers
Dynamical dark energy in the Bianchi Type-V Universe with DESI DR2 BAO, SNIa compilation and RSD measurements
Shambel Sahlu, Álvaro de la Cruz-Dombriz, A. H. A. Alfedeel +2
We investigate the cosmological implications of dynamical dark energy (DDE) models within an anisotropic, spatially homogeneous Bianchi Type-V spacetime framework using a cov…
Analytic semiclassical backreaction of a Schwarzschild black hole in a finite cavity: horizon shift, temperature renormalization, and canonical stability in the Hartle-Hawking State
G. G. L. Nashed, Alnadhief H. A. Alfedeel, Tiberiu Harko
We construct an analytic model of static semiclassical backreaction for a Schwarzschild black hole in the Hartle--Hawking state enclosed within a finite spherical cavity. Using a m…
Observational constraints on viscous cosmology in gravity
M. Koussour, Alnadhief H. A. Alfedeel, S. Muminov +1
We investigate the late-time cosmic acceleration within the framework of viscous gravity, where the gravitational action depends on both the torsion scalar and the m…
Modified cosmology in gravity
Y. Myrzakulov, Alnadhief H. A. Alfedeel, M. Koussour +3
In this letter, we investigate cosmology within the framework of modified gravity using the non-linear model , where , , and are…
Quintessence phase of the late-time Universe in gravity
Shambel Sahlu, Bhupendra Kumar Shukla, Rishi Kumar Tiwari +2
In this paper, we have studied the late-time accelerating expansion of the Universe using the matter-geometry coupled gravity model, where is the non-metricity sc…
The cosmology of gravity: constraining the background and perturbed dynamics
Shambel Sahlu, Alnadhief H. A. Alfedeel, Amare Abebe
This paper delves into the late-time accelerated expansion of the universe and the evolution of cosmic structures within the context of a specific \( f(R, L_m) \) gravity model, fo…
Bouncing behavior in gravity: Phantom crossing and energy conditions
M. Koussour, N. Myrzakulov, Javlon Rayimbaev +2
In this work, we investigate the bouncing behavior of the universe within the framework of gravity, using a simple form of (where is a f…
Probing Weyl-type gravity: Cosmological implications and constraints
Alnadhief H. A. Alfedeel, M. Koussour, N. Myrzakulov
In this paper, we investigate the cosmological implications and constraints of Weyl-type gravity. This theory introduces a coupling between the non-metricity and the…
Scalar field dark energy: Insights into cosmological evolution and black hole accretion
M. Koussour, Y. Sekhmani, Alnadhief H. A. Alfedeel +2
We propose a novel approach to parameterize the equation of state for Scalar Field Dark Energy (SFDE) and use it to derive analytical solutions for various cosmological parameters.…
Perturbations in Bianchi Type-I spacetimes with varying Lambda, G
Alnadhief H. A. Alfedeel, Maye Elmardi, Amare abebe
In this paper, we investigate the evolution of cosmological perturbations within the context of Bianchi Type spacetimes. We consider models containing viscous fluids with evolv…
Square-Root parametrization of dark energy in cosmology
M. Koussour, N. Myrzakulov, Alnadhief H. A. Alfedeel +3
This paper is a parametrization of the equation of state (EoS) parameter of dark energy (DE), which is parameterized using Square-Root (SR) form i.e. $ω_{SR}=\text{$ω_{0}$}+\text{$…
Constraining the cosmological model of modified gravity: Phantom dark energy and observational insights
M. Koussour, N. Myrzakulov, Alnadhief H. A. Alfedeel +1
Despite the significant accomplishments of general relativity, numerous unresolved issues persist in our understanding of the cosmos. One of the most perplexing challenges is the o…
Cosmological implications of the constant jerk parameter in gravity theory
N. Myrzakulov, M. Koussour, Alnadhief H. A. Alfedeel +1
This study delves into modified gravity theories that are equivalent to General Relativity but involve the torsion or non-metricity scalar instead of the curvature scalar. Specific…
Modeling cosmic acceleration with a generalized varying deceleration parameter
M. Koussour, N. Myrzakulov, Alnadhief H. A. Alfedeel +2
Understanding the accelerating expansion of the Universe remains a fundamental challenge in modern cosmology. In this paper, we investigate a cosmological model parametrized by a g…
Constrained evolution of effective equation of state parameter in non-linear dark energy model: Insights from Bayesian analysis of cosmic chronometers and Pantheon samples
N. Myrzakulov, M. Koussour, Alnadhief H. A. Alfedeel +1
We conduct a Bayesian analysis of recent observational datasets, specifically the Cosmic Chronometers (CC) dataset and Pantheon samples, to investigate the evolution of the EoS par…
Impact of dark energy on the equation of state in light of the latest cosmological data
N. Myrzakulov, M. Koussour, Alnadhief H. A. Alfedeel +1
We reconstruct the effective Equation of State (EoS) within the framework of General Relativity (GR) theory in a homogeneous and isotropic FLRW Universe, which is assumed to be com…
Constraining the cosmological model using recent observational data
N. Myrzakulov, M. Koussour, Alnadhief H. A. Alfedeel +1
In this paper, we consider a comprehensive investigation of the cosmological model described by (where represents a free parameter) in light of the most rece…
A cosmological model with time dependent , and viscous fluid in General Relativity
Rishi Kumar Tiwari, Alnadhief H. A. Alfedeel, Değer Sofuoğlu +2
In this paper, we investigate Bianchi type cosmological models with bulk viscous fluid and time varying cosmological and Newtonian parameters. The Einstein's field equa…
A Generalized Solution of Bianchi Type-V Models with Time-dependent and
Alnadhief H. A. Alfedeel, Amare Abebe, Hussam M. Gubara
We study the homogeneous but anisotropic Bianchi type-V cosmological model with time-dependent gravitational and cosmological "constants". Exact solutions of the Einstein field equ…
The Metric of the Cosmos from Luminosity and Age Data
Krzysztof Bolejko, Charles Hellaby, Alnadhief H. A. Alfedeel
This paper presents the algorithm for determining the Lemaitre-Tolman (LT) model that best fits given datasets for maximum stellar ages, and SNIa luminosities, both as functions of…
The Lemaitre Model and the Generalisation of the Cosmic Mass
Alnadhief A. H. Alfedeel, Charles Hellaby
We consider the spherically symmetric metric with a comoving perfect fluid and non-zero pressure -- the Lemaitre metric -- and present it in the form of a calculational algorithm.…
Solving the Observer Metric
Charles Hellaby, Alnadhief H. A. Alfedeel
The analysis of modern cosmological data is becoming an increasingly important task as the amount of data multiplies. An important goal is to extract geometric information, i.e. th…