Zobrazeno 1 - 10
of 221
pro vyhledávání: '"Abebe Amare"'
Autor:
Alfedeel Alnadhief H. A., Abebe Amare
Publikováno v:
Open Astronomy, Vol 31, Iss 1, Pp 198-204 (2022)
In this work, cosmological solutions based on the time-dependent cosmological (Λ\Lambda ) and Newtonian (GG) running “constants” in the Bianchi type-I spacetime are investigated vis-à-vis known cosmological data. The observationally known value
Externí odkaz:
https://doaj.org/article/7520c5b8e8f34a2988810ed862a99528
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 accelerating expansion of the universe. Both models are constrained usin
Externí odkaz:
http://arxiv.org/abs/2412.09024
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 described in the Lambda cold dark matter ($\Lambda$CDM) model. Instead
Externí odkaz:
http://arxiv.org/abs/2412.06523
We revise the cosmological interaction between dark energy and dark matter. More precisely, we focus on models that support compartmentalization or co-existence in the dark sector of the universe. Within the framework of a homogeneous and isotropic,
Externí odkaz:
http://arxiv.org/abs/2409.05348
This paper investigates the impact of the effects of bulk viscosity on the accelerating expansion and large-scale structure formation of a universe in which the underlying gravitational interaction is described by $f(Q)$ gravity. Various toy models o
Externí odkaz:
http://arxiv.org/abs/2408.02775
Autor:
Abebe Amare
Publikováno v:
Ecosystem Health and Sustainability, Vol 5, Iss 1, Pp 57-66 (2019)
This research is aimed at investigating Corporate Environmental Responsibility in Manufacturing Enterprises in the Akaki River basin on protecting the urban environment with particular emphasis on twenty selected industries. To attain its objective,
Externí odkaz:
https://doaj.org/article/6ab9bac884bf444e9cec071dc6043848
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, formulated as \( f(R, L_m) = \lambda R + \beta L_m^\alpha + \eta \). To
Externí odkaz:
http://arxiv.org/abs/2406.08303
We take into account redshift-space distortion measurements to investigate the growth of cosmological large-scale structures within the framework of modified symmetric teleparallel $f(Q)$ gravity. After comparing the predictions of the $f(Q)$-gravity
Externí odkaz:
http://arxiv.org/abs/2405.07361
We present a dynamical system formulation for inhomogeneous LRS-II spacetimes using the covariant 1+1+2 decomposition approach. Our approach describes the LRS-II dynamics from the point of view of a comoving observer. Promoting the covariant radial d
Externí odkaz:
http://arxiv.org/abs/2404.01161
In this paper, we investigate the evolution of cosmological perturbations within the context of Bianchi Type$-I$ spacetimes. We consider models containing viscous fluids with evolving cosmological (\LL) and Newtonian gravitational (G) parameters. The
Externí odkaz:
http://arxiv.org/abs/2311.03399