Turbulence in Magnetised Neutron Stars

The magnetic field configuration in the interior of Neutron Stars is an open problem and may be impacted by the influence of a turbulent cascade within the star. Turbulent magnetic fields also play a key role in the evolution of Binary Neutron Star (BNS) mergers, driving outflowing matter and launching ultrarelativistic jets.

Modelling turbulent flow with numerical simulations either requires incredibly high resolution simulations, or effective models to capture the impact of turbulence on large scales. In this talk I will firstly present a series of high resolution simulations of magnetised isolated neutron stars, to discuss the impact of the magnetic field on turbulent flow in the star interior, and the long term evolution of the magnetic field configuration.

I will then discuss the impact of the end state of this magnetic field configuration on a BNS merger, and demonstrate the construction of a subgrid model to effectively incorporate the impact of turbulence in such simulations.