4 papers
An adaptive framework for the axisymmetric pulsar magnetosphere using physics-informed Kolmogorov-Arnold networks
Spyros Rigas, Ioannis Contopoulos, Georgios Alexandridis +1
The pulsar magnetosphere has only recently been addressed using Physics-Informed Neural Networks (PINNs), by deploying a domain-decomposition approach and treating the separatrix a…
High-energy radiation from the pulsar Equatorial Current Sheet
Ioannis Contopoulos, Jerome Petri, Ioannis Dimitropoulos
Pulsars emit beams of radiation that reveal the extreme physics of neutron star magnetospheres. Yet, their understanding remains incomplete. Recent global Particle-in-Cell (PIC) si…
The azimuthal structure of magnetically arrested disks during flux eruption events
Argyrios Loules, Antonios Nathanail, Ioannis Contopoulos
We analyze data from a standard 3D general-relativistic magnetohydrodynamics (GRMHD) simulation, focusing on equatorial slices in order to examine the details and the evolution of…
The impact of resistivity on the variability of black hole accretion flows
Antonios Nathanail, Yosuke Mizuno, Ioannis Contopoulos +4
Context. The accretion of magnetized plasma onto black holes is a complex and dynamic process, where the magnetic field plays a crucial role. The amount of magnetic flux accumulate…