Hall-drift induced magnetic field instability in neutron stars
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Updated: Oct 2, 2026

Magnetically Induced Rotating Rayleigh-Taylor Instability
Published on: March 3, 2017
1Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany.
Abstract:
In the presence of a strong magnetic field and under conditions as realized in the crust and the superfluid core of neutron stars, the Hall drift dominates the field evolution. We show by a linear analysis that, for a sufficiently strong large-scale background field depending at least quadratically on position in a plane conducting slab, an instability occurs which rapidly generates small-scale fields. Their growth rates depend on the choice of the boundary conditions, increase with the background field strength, and may reach 10(3) times the Ohmic decay rate. The effect of that instability on the rotational and thermal evolution of neutron stars is discussed.
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