Journal
GEOPHYSICAL AND ASTROPHYSICAL FLUID DYNAMICS
Volume 98, Issue 5, Pages 407-428Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/0309192042000272324
Keywords
magnetic reconnection; magnetohydrodynamics; magnetic flux; magnetic null points
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Magnetic reconnection at a three-dimensional null point is the natural extension of the familiar two-dimensional X-point reconnection. A model is set up here for reconnection at a spiral null point, by solving the kinematic, steady, resistive magnetohydrodynamic equations in its vicinity. A steady magnetic field is assumed, as well as the existence of a localised diffusion region surrounding the null point. Outside the diffusion region the plasma and magnetic field move ideally. Particular attention is focussed on the way that the magnetic flux changes its connections as a result of the reconnection. The resultant plasma flows are found to be rotational in nature, as is the change in connections of the magnetic field lines.
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