Magnetic Equilibrium
Andrei Gruzinov
TL;DR
This paper proposes that magnetic equilibrium in ideal fluids includes pervasive singular current layers, which could explain magnetic field decay and magnetar flares in neutron stars.
Contribution
It introduces the concept of volume-filling singular current layers in magnetic equilibrium and links their dissipation to magnetic field decay and magnetar activity.
Findings
Singular current layers are predicted to fill the volume in magnetic equilibrium.
Residual dissipation in these layers may drive magnetic field decay.
This mechanism could trigger magnetar flares.
Abstract
We propose that generic magnetic equilibrium of an ideally conducting fluid contains a volume-filling set of singular current layers. Singular current layers should exist inside neutron stars. Residual dissipation in the singular current layers might be the main mechanism for the magnetic field decay. The slow decay of the field might be the clock responsible for triggering the magnetar flares.
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Taxonomy
TopicsGeomagnetism and Paleomagnetism Studies · Geophysics and Gravity Measurements · Geological and Geophysical Studies