309 citations · 845 across the 18 of their papers we have counts for
10 papers · 1 filter
Emergent Universe from Energy-Momentum Squared Gravity
Mohsen Khodadi, Alireza Allahyari, Salvatore Capozziello
In order to bypass the big bang singularity, we develop an emergent universe scenario within a covariant extension of General Relativity known as \emph{"Energy-Momentum Squared Gra…
Testing No-Hair Theorem by Quasi-Periodic Oscillations: the quadrupole of GRO J165540
Alireza Allahyari, Lijing Shao
We perform an observational test of no-hair theorem using quasi-periodic oscillations within the relativistic precession model. Two well motivated metrics we apply are Kerr-Q and H…
Black holes with scalar hair in light of the Event Horizon Telescope
Mohsen Khodadi, Alireza Allahyari, Sunny Vagnozzi +1
Searching for violations of the no-hair theorem (NHT) is a powerful way to test gravity, and more generally fundamental physics, particularly with regards to the existence of addit…
Magnetically charged black holes from non-linear electrodynamics and the Event Horizon Telescope
Alireza Allahyari, Mohsen Khodadi, Sunny Vagnozzi +1
Non-linear electrodynamics (NLED) theories are well-motivated extensions of QED in the strong field regime, and have long been studied in the search for regular black hole (BH) sol…
Mimetic Black Holes
Mohammad Ali Gorji, Alireza Allahyari, Mohsen Khodadi +1
In this paper, we look for the vacuum static spherically symmetric solution in the mimetic gravity scenario based on the conformal invariance principle. The trivial solution is a s…
Quasinormal Modes of Generalized Black Holes: delta-Kerr Spacetime
Alireza Allahyari, Hassan Firouzjahi, Bahram Mashhoon
The nonlinear superposition of the delta-metric and the Kerr metric results in delta-Kerr metric that represents a deformed Kerr black hole with delta = 1 + q, where q > 0 is propo…