35 citations · 99 across the 8 of their papers we have counts for
6 papers
Halo heating from fluctuating gas in a model dwarf
Mahmoud Hashim, Amr El-Zant, Jonathan Freundlich +2
The cold dark matter (CDM) structure formation scenario faces challenges on (sub)galactic scales, central among them being the `cusp-core' problem. A known remedy, driving CDM out…
Dissipative Unified Dark Fluid: Observational Constraints
Esraa Ali Elkhateeb, Mahmoud Hashim
We adopt a standard FRW cosmology with a unified scenario, where the usual dark matter and dark energy sectors are replaced by a single dissipative unified dark fluid (DUDF). The e…
Toward a concordance teleparallel Cosmology II: Linear perturbation
Mahmoud Hashim, Amr A. El-Zant, Waleed El Hanafy +1
Late time cosmic acceleration may be achieved by modifying gravity on large scales. This should also have consequences on the evolution of perturbations. We thus extend our study o…
Toward a concordance teleparallel Cosmology I: Background Dynamics
Mahmoud Hashim, Waleed El Hanafy, Alexey Golovnev +1
Assuming a spatially flat universe, we study the cosmological viability of an infrared corrected teleparallel gravity model, which accounts for late acceleration by weakening gravi…
Cosmic Degeneracies III: N-body Simulations of Interacting Dark Energy with Non-Gaussian Initial Conditions
M. Hashim, C. Giocoli, M. Baldi +2
We perform for the first time N-body simulations of Interacting Dark Energy assuming non-Gaussian initial conditions, with the aim of investigating possible degeneracies of these t…
Degeneracy between primordial non-Gaussianity and interaction in the dark sector
Mahmoud Hashim, Daniele Bertacca, Roy Maartens
If dark energy and dark matter interact via exchange of energy and momentum, then this may affect the galaxy power spectrum on large scales. When this happens, it may be degenerate…