New models for fast steady state magnetic reconnection

Details New models for fast steady state magnetic reconnection New models for fast steady state magnetic reconnection

May 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....91.5579p&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 91, May 1, 1986, p. 5579-5588.

Astronomy and Astrophysics

Astronomy

262

Astronomical Models, Magnetic Field Reconnection, Plasma Dynamics, Space Plasmas, Incompressible Flow, Lines Of Force, Magnetohydrodynamic Flow, Propagation Modes, Steady State

Scientific paper

A new unified family of models for incompressible, steady-state magnetic reconnection in a finite region is presented. The models are obtained by expanding in powers of the Alfven Mach number and may be used to elucidate some of the puzzling properties of numerical experiments on reconnection which are not present in the classical models. The conditions imposed on the inflow boundary of the finite region determine which member of the family occurs. Petscheklien and Sonnerup like solutions are particular members. The Sonneruplike regime is a special case of a weak slow mode expansion in the inflow region, and it separates two classes of members with reversed currents. The Petscheklike regime is a singular case of a weak fast mode expansion, and it separates the hybrid regime from a regime of slow mode compressions. Care should be taken in deciding which type of reconnection is operating in a numerical experiment. Indeed, no experiment to date has used boundary conditions appropriate for demonstrating steady state Petschek reconnection.

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