output
20062026
most citedShadows and gravitational weak lensing by the Schwarzschild black hole in the string cloud background with quintessential field

140 citations

Showing astro-ph.COShow all

8 papers · 1 filter

astro-ph.CO2025★ 11 cited

Bulk viscous matter in gravity: A path to cosmic acceleration

Kairat Myrzakulov, O. Donmez, M. Koussour +3

In this paper, we investigate the effects of varying bulk viscosity coefficients on cosmic evolution within the framework of teleparallel gravity. We foc…

astro-ph.CO2024★ 21 cited

Observational constraints on a generalized equation of state model

M. Koussour, S. Bekov, A. Syzdykova +3

We investigate the cosmological implications of a generalized total equation of state (EoS) model by constraining its parameters using observational datasets to effectively charact…

astro-ph.CO2024★ 33 cited

Observational analysis of late-time acceleration in gravity

Kairat Myrzakulov, M. Koussour, O. Donmez +3

In this study, we explored late-time cosmology within an extended class of theories based on gravity. This theory generalizes gravity by incorporating a non-mini…

astro-ph.CO2024★ 22 cited

Constraints on anisotropic properties of the universe in gravity theory

A. Zhadyranova, M. Koussour, V. Zhumabekova +3

Motivated by anomalies in cosmic microwave background observations, we investigate the implications of gravity in Bianchi type-I spacetime, aiming to characterize the uni…

astro-ph.CO2024★ 13 cited

Exploring cosmological evolution and constraints in teleparallel gravity

M. Koussour, A. Altaibayeva, S. Bekov +3

This study explores the extension of teleparallel gravity within the framework of general relativity, introducing an algebraic function dependent on the torsion scalar .…

astro-ph.CO2024★ 35 cited

Late-time cosmology in gravity: Analytical solutions and observational fits

Yerlan Myrzakulov, O. Donmez, M. Koussour +3

In this study, we examined the late-time cosmic expansion of the universe within the framework of gravity, where denotes the non-metricity and represents th…

astro-ph.CO2024★ 10 cited

Signature flips in time-varying cosmological models with observational data

Yerlan Myrzakulov, M. Koussour, M. Karimov +1

In this study, we investigate signature flips within the framework of cosmological models featuring a time-varying vacuum energy term . Specifically, we consider the power-la…

astro-ph.CO2024★ 34 cited

Constraining gravity with bulk viscosity

Y. Myrzakulov, O. Donmez, M. Koussour +3

We investigate the influence of bulk viscosity on late-time cosmic acceleration within an extended gravity framework, where the non-metricity is non-minimally coupl…