A note on the magnetic field topology in the vicinity of neutral points in the resistive MHD and collisionless plasma approximations; geometry of field-lines in the geomagnetic tail

Details A note on the magnetic field topology in the vicinity of neutral points in the resistive MHD and collisionless plasma approximations; geometry of field-lines in the geomagnetic tail A note on the magnetic field topology in the vicinity of neutral points in the resistive MHD and collisionless plasma approximations; geometry of field-lines in the geomagnetic tail

Nov 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986ap%26ss.127..321h&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 127, no. 2, Nov. 1986, p. 321-325.

Astronomy and Astrophysics

Astrophysics

Collisionless Plasmas, Geomagnetism, Magnetic Field Reconnection, Topology, Boundary Value Problems, Geomagnetic Tail, Magnetohydrodynamics, Wave Functions

Scientific paper

Two-dimensional models of the reconnection process are, under the appropriate boundary and initial conditions, feasible for a resistive MHD continuum, but not for a collisionless plasma. Here, the field-lines entering the neutral line neighbourhood (of the size of ion-gyroradius) are 'swept' by the electron motion in the direction perpendicular to the plane in which the distant field-lines lie. The 'sweeping' effect and the convection of field-lines in the geomagnetic tail explain the magnetic field observationss in tailward flowing plasmas at substorm onsets.

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