124 citations · 418 across the 27 of their papers we have counts for
4 papers · 1 filter
Big rip in Swiss-cheese Brane-worlds with cosmic transit
Nasr Ahmed, M. Fekry, Tarek M. Kamel
We study the big rip scienario in Swiss-cheese Brane-worlds. The results obtained have been found to be independent of the value of the cosmological constant whether its positi…
Cosmographic analysis of a closed bouncing universe with the varying cosmological constant in gravity
Vinod Kumar Bhardwaj, Anirudh Pradhan, Nasr Ahmed +1
Modeling of matter bounce in gravity has been presented with no violation of the null energy condition. Only a closed universe with negative pressure is allowed in good ag…
Some cosmological features of 4D Gauss-Bonnet gravity with varying cosmological constant
Nasr Ahmed, Ajab A. Alfreedi, Alaa A. Alzulaibani
We explore some cosmological features of the newly suggested 4D Gauss-Bonnet gravity through two different models assuming a varying cosmological constant. Observational constraint…
A non-singular closed bouncing universe without violation of null energy condition
Nasr Ahmed, Tarek M. Kamel, Mohamed I Nouh
A matter bouncing entropy-corrected cosmological model has been suggested. The model allows only positive curvature with negative pressure and no violation of the null energy condi…