Physics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm31a1687e&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #SM31A-1687
Physics
2720 Energetic Particles: Trapped, 2723 Magnetic Reconnection (7526, 7835), 2753 Numerical Modeling
Scientific paper
A previous analysis of data from the Wind spacecraft has revealed that electrons were trapped in the reconnection region encountered in the deep magnetotail [1]. Here we present a new analytical theory for the electron distribution function, which successfully accounts for the anisotropic electron features observed by Wind. The anisotropy is related to extensive trapping of electrons in parallel electric fields. The electron density and equations of state for the parallel and perpendicular electron pressures are obtained by taking moments of the derived electron distribution function. The resulting model is successfully benchmarked against a kinetic simulation. Thus, the new approach allows for extensive fluid modeling of impulsive reconnection while retaining the important kinetic effects of the electrons. [1] J.~Egedal, M.~ Oieroset, W.~Fox, and R.~P.~Lin., Phys.~Rev.~Lett., 94, 025006 (2005). This work is supported by DOE Junior Faculty Award DE-F602-06ER54878 and NSF/DOE Award PHY-0613734
Daughton William
Egedal Jan
Fox Walter
Katz Nets
Le Anh
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