Physics – Plasma Physics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsh34a..05l&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SH34A-05
Physics
Plasma Physics
[2164] Interplanetary Physics / Solar Wind Plasma, [7827] Space Plasma Physics / Kinetic And Mhd Theory
Scientific paper
We present self consistent kinetic simulations where we explore the effects of electron-electron and electron-proton collisions against the radial expansion of a supersonic wind on the electron velocity distribution function. The combined effects of collisions and expansion naturally generate a two electron populations: a collisional dominated core and an almost collisionless collimated "halo". Several properties of the electron velocity distribution function are compared with spacecraft data: in particular we find that relative densities, drift velocities, temperatures gradients of the two populations are consistent to what observed in the real solar wind. A discussion on the electron heat flux properties is also presented.
Landi Simone
Matteini Lorenzo
Pantellini Filippo
Velli M. M.
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