299 citations · 966 across the 66 of their papers we have counts for
7 papers · 1 filter
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…
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…
Cross-correlation between the thermal Sunyaev-Zeldovich effect and the Integrated Sachs-Wolfe effect
Ayodeji Ibitoye, Wei-Ming Dai, Yin-Zhe Ma +5
We present a joint cosmological analysis of the power spectra measurement of the Planck Compton parameter and the integrated Sachs-Wolfe (ISW) maps. We detect the statistical corre…
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…
CoLFI: Cosmological Likelihood-free Inference with Neural Density Estimators
Guo-Jian Wang, Cheng Cheng, Yin-Zhe Ma +3
In previous works, we proposed to estimate cosmological parameters with the artificial neural network (ANN) and the mixture density network (MDN). In this work, we propose an impro…
Interacting dark energy: clarifying the cosmological implications and viability conditions
Marcel A. van der Westhuizen, Amare Abebe
In this study, cosmological models are considered, where dark matter and dark energy are coupled and may exchange energy through non-gravitational interactions with one other. Thes…