3 papers
gr-qc2026
Modified Teukolsky formalism: Null testing and numerical benchmarking
Fawzi Aly, Mahmoud A. Mansour, Luis Lehner +3
Next-generation gravitational-wave detectors will make black-hole ringdown an increasingly sensitive probe of small departures from General Relativity in the strong-field regime. T…
gr-qc2025
More Nonlinearities? II. A Short Guide of First- and Second-Order Electromagnetic Perturbations in the Schwarzschild Background
Fawzi Aly, Mahmoud A. Mansour, Dejan Stojkovic
We study second-order electromagnetic perturbations in the Schwarzschild background and derive the effective source terms for Regge-Wheeler equation which are quadratic in first-or…
gr-qc2024
More Nonlinearities? Electromagnetic and Gravitational Mode Mixing in NSBH Mergers
Fawzi Aly, Mahmoud A. Mansour, Dejan Stojkovic
We investigate the possibility of electromagnetic fields leaving imprints on gravitational wave (GW) signals from Neutron Star-Black hole (NSBH) mergers, specifically in the contex…