Mathematics – Logic
Scientific paper
May 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sm51b03m&link_type=abstract
American Geophysical Union, Spring Meeting 2001, abstract #SM51B-03
Mathematics
Logic
2724 Magnetopause, Cusp, And Boundary Layers, 2731 Magnetosphere--Outer
Scientific paper
The anti-parallel merging hypothesis has guided our thinking about dayside magnetopause reconnection for some time, but some lines of thinking and recent observation have pointed toward significant, if sub-maximal, reconnection rates in locales with less than anti-parallel field shear. We briefly review these arguments as motivation for the following line of thought: Quasi-steady reconnection on a boundary surface should be constrained topologically as well as by local magnetic shear. Component reconnection defines a local neutral line along which field lines are reconnected smoothly, i.e., without entanglement with their neighbors. When non-uniform fields reconnect on a surface, a locus can be defined as a neutral curve across the surface, along which component reconnection can proceed. A family of locii can be found by integrating the local neutral line across the surface from arbitrary points, but the subsolar point provides a strong candidate point for anchoring a prime locus. Unlike the locus of antiparallel reconnection, the locus of component reconnection can traverse the subsolar magnetopause at any clock angle of the interplanetary magnetic field. It is suggested that this locus represents the natural location of reconnection on the magnetopause, subject of course to non-uniformities and dynamics of the interplanetary magnetic field and plasma.
Chandler Michael O.
Fok M.-
Moore Thomas Earle
Pollock C. J.
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