51 citations · 128 across the 44 of their papers we have counts for
18 papers · 1 filter
Geodesics and thermodynamics of a -deformed anti-de Sitter black hole surrounded by a quintessence field
Faizuddin Ahmed, Ahmad Al-Badawi, Izzet Sakalli +1
We investigate the geodesic structure and thermodynamics of a -deformed Schwarzschild-anti-de Sitter black hole in a Kiselev quintessence field, where dynamics are governed by a…
An exact dyonic black hole at the integrable locus of quadratic nonlinear electrodynamics
Faizuddin Ahmed, Ahmad Al-Badawi, Izzet Sakalli
We obtain an exact dyonic black-hole solution in quadratic nonlinear electrodynamics defined by on the special locus . At this locus, the radial dependenc…
MCMC Constraints on Dyonic Kalb-Ramond Black Holes with a Cloud of Strings from Twin-Peak QPOs and EHT Shadows
Faizuddin Ahmed, Ahmad Al-Badawi, İzzet Sakallı
We study a dyonic black hole in a Lorentz-violating gravity that carries a background Kalb--Ramond field and is pierced by a cloud of strings. The resulting metric reduces to the r…
Are Petrov type-N and D spacetimes admitting CTCs valid in gravity?
Faizuddin Ahmed, Ahmad Al-Badawi, İzzet Sakallı
We ask whether two classical time-machine geometries, the Ori (2005) compact-vacuum-core metric and the Ahmed (2018) four-dimensional generalisation of Misner space, remain admissi…
Astrophysical signatures of Kerr-Bertotti-Robinson black holes in a cloud of strings: ISCO, microquasar QPOs, and Bondi-Hoyle-Lyttleton accretion
Faizuddin Ahmed, Orhan Donmez, Ahmad Al-Badawi +1
We study test-particle dynamics in the equatorial plane of a Kerr-Bertotti-Robinson black hole (BH) immersed in a cloud of strings (CS), with mass M , rotation a, magnetic paramete…
Astrophysical Signatures of Einstein-Skyrme Anti-de Sitter Black Holes: Epicyclic Frequencies and QPO Constraints
Faizuddin Ahmed, Ahmad Al-Badawi, İzzet Sakallı
We study the geodesic motion and epicyclic oscillations of massive test particles around a static, spherically symmetric black hole (BH) solution of the Einstein--Skyrme (ES) theor…