3 papers
gr-qc2025
Teukolsky by Design: A Hybrid Spectral-PINN solver for Kerr Quasinormal Modes
Alexandre M. Pombo, Lorenzo Pizzuti
We introduce SpectralPINN, a hybrid pseudo-spectral/physics-informed neural network (PINN) solver for Kerr quasinormal modes that targets the Teukolsky equation in both the separat…
gr-qc2025
-balls, neural networks and galaxy rotation curves
Alexandre M. Pombo, Lorenzo Pizzuti, Alessandra di Giacomo
Can a dynamically robust (\textit{aka} stable) -ball reproduce the rotation curve of a disk galaxy? In an astrophysical environment, -balls are non-topological solitons that…
astro-ph.CO2024
Modified gravity in galaxy clusters: Joint analysis of Hydrostatics and Caustics
Minahil Adil Butt, Sandeep Haridasu, Yacer Boumechta +4
We present a comprehensive joint analysis of two distinct methodologies for measuring the mass of galaxy clusters: hydrostatic measurements and caustic techniques. We show that by…