37 citations
- North-West UniversityZA10 papers
- Ethiopian Space Science and Technology InstituteET6 papers
- College of Science and Technology - University of RwandaRW4 papers
- National Institute for Theoretical PhysicsZA4 papers
- University of Cape TownZA4 papers
- Universidad de SalamancaES2 papers
- University of OsloNO2 papers
- Addis Ababa UniversityET1 paper
- Dilla UniversityET1 paper
- Imam Mohammad ibn Saud Islamic UniversitySA1 paper
- South African Radio Astronomy ObservatoryZA1 paper
- University of KhartoumSD1 paper
11 papers
Constraints of Cosmic Expansion Using an MSF
Goratamang Gaedie, Shambel Sahlu, Amare Abebe
In this paper, we propose a modified scale factor (MSF) that allows us to explore the accelerating expansion of the universe without invoking the traditional dark-energy model, as…
Constraining viscous fluid models in gravity with data
Shambel Sahlu, Renier T. Hough, Amare Abebe +1
We investigate the impact of bulk viscosity on the accelerating expansion and large-scale structure formation of a Universe in which the underlying gravitational interaction is des…
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…
Structure growth in cosmology
Shambel Sahlu, Álvaro de la Cruz-Dombriz, Amare Abebe
We take into account redshift-space distortion measurements to investigate the growth of cosmological large-scale structures within the framework of modified symmetric teleparallel…
The amplitudons of dynamical stable binary cubic crystals for hot-electron cooling in BaTe, CdTe, SrTe and SnTe for enhanced photo voltaic effect
Tewodros Eyob Ada, Kenate Nemera Nigussa, Lemi Demeyu Deja +1
Dynamical properties of materials determined using force constant expansions in the HIPHIVE package and density functional theory as implemented in the Gpaw code. Thermal conductiv…
Covariant density and velocity perturbations of the quasi-Newtonian cosmological model in gravity
Heba Sami, Shambel Sahlu, Amare Abebe +1
We investigate classes of shear-free cosmological dust models with irrotational fluid flows within the framework of gravity. In particular, we use the covariant form…