Physics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm52a..05g&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SM52A-05
Physics
[2744] Magnetospheric Physics / Magnetotail, [2752] Magnetospheric Physics / Mhd Waves And Instabilities, [2753] Magnetospheric Physics / Numerical Modeling
Scientific paper
Dipolarization fronts which are characterized by a steep increase or jump in the z component of the earth’s tail magnetic field have been reported in satellite data as well as kinetic simulations. It was recently shown using 2D MHD simulations (Guzdar et al., A simple MHD model for the formation of multiple dipolarization fronts, GRL, in press, 2010) that the observed multiple dipolarization fronts can be explained by the nonlinear state of the interchange and Kelvin-Helmholtz “mushroom” like structures which can develop during the process of dipolarization after a reconnection event. We have now extended the code to include Hall effects and find that on these sharp fronts which can be of the order of the ion skin depth, wave-like structures develop which has large amplitude primarily on these fronts but also radiate waves away from the fronts in the plasma bubbles structures. The characteristics of these waves are determined by the velocity of the front and the strength of the magnetic field and the density in these fronts.
Guzdar Parvez N.
Hassam Adil
Sitnov Mikhail I.
Swisdak Michael
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