5 papers
Cosmological Viability of Exponential Infrared Gravity
Mahmoud Hashim, Eleonora Di Valentino, Jackson Levi Said +1
We investigate the cosmological viability of exponential infrared teleparallel gravity using current cosmological observations. This framework realizes late-time cosmic acce…
Rotating traversable wormholes and particle dynamics in gravity
G. G. L. Nashed, Waleed El Hanafy, Amare Abebe +2
Traversable wormholes are among the most interesting solutions of gravitational theories, but within General Relativity they generally require exotic matter violating the null ener…
Buchdahl limit of compact stars in presence of Weyl anomaly
Waleed El Hanafy, G. G. L. Nashed
We setup an anisotropic compact star model in presence of Weyl ``trace" anomaly. We derive an exact interior solution which determines the contribution of the vacuum trace anomaly.…
A preference for dynamical phantom dark energy using one-parameter model with Planck, DESI DR1 BAO and SN data
Ramy Fikri, Esraa Elkhateeb, E. I. Lashin +1
Baryon Acoustic Oscillation (BAO) provides a powerful tool to measure cosmic expansion and consequently the nature of the Dark Energy (DE). Recent precise BAO measurements by Dark…
Stable soliton dark matter wormhole in non-minimally coupled gravity
G. G. L. Nashed, Waleed El Hanafy
We show that non-minimal coupling between matter and geometry can indeed help in constructing stable, traversable, wormholes (WHs) without requiring exotic matter under certain con…