37 citations · 129 across the 25 of their papers we have counts for
8 papers · 1 filter
Conformally Interacting Dark Energy with Early and Late-Time Measurements
Shambel Sahlu, Abunie Gezahegn, Amare Abebe +2
The conformal interacting dark energy (CIDE) model is investigated by introducing a scalar field representing dark energy (DE) coupled to dark matter (DM) via a conformal transform…
Testing the Coexistence of Dark Energy and Dark Matter with Late-time Observational Data
Shambel Sahlu, Andronikos Paliathanasis, Genly Leon +1
We investigate the viability of a cosmological scenario with interacting dark sector, which can describe the coexistence between dark energy and dark matter. The model possesses an…
Diffusive dark fluids with Planck-2018 and DESI BAO DR2 Measurements
Shambel Sahlu, Amare Abebe
In this paper, we constrain the diffusive dark fluid cosmological model, which is the interacting dark energy framework, wherein energy is transferred between the two dark componen…
Kosmulator: A Python framework for cosmological inference with MCMC
Renier T. Hough, Robert Rugg, Shambel Sahlu +1
We present Kosmulator, a modular and vectorised Python framework designed to accelerate the statistical testing of cosmological models. As the theoretical landscape expands beyond…
Compartmentalization in the Dark Sector of the Universe after DESI DR2 BAO data
Marcel van der Westhuizen, David Figueruelo, Rethabile Thubisi +3
We consider a non-linear interaction between the dark matter and dark energy components of the universe. In particular, within the FLRW geometry, where dark matter is described by…
Interacting dark energy models
Robert Rugg, Shambel Sahlu, Amare Abebe
This work focuses on two linear interaction models between dark matter and dark energy, which are proposed as key factors in explaining cosmic history, specifically the latetime ac…
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…
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…