Speaker
Description
The inclusion of magnetic fields in neutron star merger simulations is essential for understanding a wide range of phenomena, from the efficiency of magnetic field amplification during the merger to the formation of a magnetar and/or jet. Accurate magnetic field evolution is also crucial for modelling the electromagnetic counterparts of these mergers. Current GRMHD codes typically rely either on divergence cleaning techniques or on vector potential formulations to enforce the no-monopole constraint. Although the vector potential approach satisfies this constraint naturally, its implementation in existing codes often requires complicated staggered grids, and the resulting magnetic field accuracy can be limited. In this talk, we introduce our new code, which employs a simple and accurate vertex-centred method for evolving magnetic fields and demonstrates seventh-order accuracy.