Auroral arcs as manifestations of magnetic fractures.

Details Auroral arcs as manifestations of magnetic fractures. Auroral arcs as manifestations of magnetic fractures.

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aaam.book.....h&link_type=abstract

Auroral arcs as manifestations of magnetic fractures., by Haerendel, G.. Iowa Univ., Iowa City (USA). Dept. of Physics and Astr

Astronomy and Astrophysics

Astronomy

Scientific paper

Properties of structured auroral arcs are derived from a model according to which magnetic energy is dominantly converted into kinetic energy of field-aligned particle beams. After a summary of the main features of the fracture model, the author addresses the relative and absolute transverse scale lengths implied by this model. Then he looks into the impact of the interaction between emitted Alfvén waves and current generator on the structure of auroral arcs. He checks the appropriateness of the used macroscopic description vis-à-vis kinetic effects and presents an attempt to reconcile the current instability/Alfvén wave picture with the mirror resistivity concept.

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