Statistics – Applications
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsm22a0809o&link_type=abstract
American Geophysical Union, Fall Meeting 2001, abstract #SM22A-0809
Statistics
Applications
2411 Electric Fields (2712), 2431 Ionosphere/Magnetosphere Interactions (2736), 2704 Auroral Phenomena (2407), 7835 Magnetic Reconnection, 7843 Numerical Simulation Studies
Scientific paper
The GEM magnetic reconnection challenge provided important new insight into the role of Hall physics in a simple magnetic reconnection geometry. However, these results apply to a system with symmetric anti-parallel magnetic fields in a very small spatial domain. We will address two important extensions of the basic geometry using two-dimensional two-fluid simulations. (A) It is not at all clear whether or not the physics introduced by the Hall dynamics survives on large scales, i.e., for outflow regions much larger than the ion inertia scale or for large scale magnetic flux ropes formed by the reconnection process. (B) Shear flow and the presence of a finite By introduce a significant amount of By flux in magnetic flux ropes. This is known to generate strong core magnetic fields consistent with observations of magnetic flux transfer events. It is therefore important to quantify the contribution of the Hall dynamics to the By flux in large scale flux ropes created by magnetic reconnection. We will first discuss and quantify the pure MHD effects of the By generation. The introduction of the Hall physics generates additional By magnetic flux and causes a systematic asymmetry of the By distribution in the flux ropes. We will quantify those effects for large scale flux ropes and discuss applications to the Earth's magnetopause.
Nykyri Katariina
Otto Andreas
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