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Session: Cosmology and Relativistic Astrophysics

Name: Mr. Petros Stefanou (Universidad de Valencia, Universidad de Alicante)
Coauthors: No coauthors were included.
Type: Oral
Title: Modelling Force-Free Magnetospheres of Isolated Neutron Stars
Abstract:

We present stationary force-free magnetospheric models for non-rotating (magnetars) and rotating (pulsars) isolated neutron stars. For 2D models, we use Physics-Informed Neural Networks, a modern, flexible approach in solving PDEs. We introduce networks that are trained for general boundary conditions and source terms that can produce new solutions with very small computational cost, after training. We show that past, known results are recovered reliably and demonstrate the potential of this approach in certain applications, such as the coupling of the magnetosphere with the interior evolution. We employ a finite differences Grad-Rubin solver for 3D models. We present novel results for twisted, current-filled magnetospheres in the non-axisymmetric and time-independent regime. Our results are in-line with MHD simulations as well as with observations.