Reconnection and the Ideal Evolution of Magnetic Fields

Details Reconnection and the Ideal Evolution of Magnetic Fields Reconnection and the Ideal Evolution of Magnetic Fields

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002phrvl..88u5005b&link_type=abstract

Physical Review Letters, vol. 88, Issue 21, id. 215005

Astronomy and Astrophysics

Astrophysics

10

Scientific paper

A magnetic evolution is ideal if it is consistent with the field being embedded in a perfectly conducting fluid. Faraday's law implies the evolution is ideal when the parallel component of the electric field is the derivative of a scalar potential, a condition that generically holds in any local region of space. Reconnection requires the non-existence of such a potential. In systems with two periodic directions, non-existence focuses reconnection onto the surfaces in which the magnetic field lines close on themselves, the rational surfaces. This rational surface effect does not arise in astrophysics but does appear in periodic simulation codes. Effects that could give astrophysical reconnection are discussed.

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