Journal
GEOPHYSICAL AND ASTROPHYSICAL FLUID DYNAMICS
Volume 99, Issue 1, Pages 77-93Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/03091920512331328071
Keywords
magnetic reconnection; magnetohydrodynamics; magnetic flux; magnetic null points
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Magnetic reconnection at a three-dimensional null point is a natural extension of the familiar two-dimensional X-point reconnection. A model is Set Lip here for reconnection at a null point with current directed parallel to the fan plane, by solving the kinematic, steady, resistive magnetohydrodynamic equations in its vicinity. The magnetic field is assumed to be steady, and a localised diffusion region surrounding the null point is also assumed, outside which the plasma is ideal. Particular attention is focussed on the way that the magnetic flux changes its connections as a result or the reconnection. The resultant plasma flow is found to cross the spine and fan of the null, and thus transfer magnetic flux between topologically distinct regions. Solutions arc also found in which the now crosses either the spine or fan only.
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