Simulating magnetic field evolution in isolated neutron stars

Ankan Sur

We present results for magnetohydrodynamical simulations of evolving neutron stars in the first moments of its lifetime. We study the poloidal field instability and how the magnetic field components change with time. We find that although our final field does not reach a stable equilibrium, it settles to a twisted torus geometry with a dominant poloidal component and a weaker toroidal field reaching 10% of the total magnetic energy at 40 ms. However, at much later evolution times (t ∼ 450 ms), the toroidal field reduces to 1% of the total magnetic energy.

Proceedings of the Polish Astronomical Society, vol. 12, 231-236 (2022)

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