Importance of electric fields in modeling space plasmas

Details Importance of electric fields in modeling space plasmas Importance of electric fields in modeling space plasmas

Feb 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007jastp..69...18p&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 69, Issue 1-2, p. 18-23.

Physics

Scientific paper

Many space plasma models use magnetohydrodynamic (MHD) theory with the approximation that the high conductivity of plasmas does not support electric fields in the fluid frame (ideal approximation). We will show that physics is consistent only if the small electric field is included. Even then, MHD theory requires knowledge about collisionless conductivity for which there is little information. MHD theory has other restrictions that make it inapplicable to collisionless space plasmas. We apply MHD and ideal MHD concepts to observations and discuss why they are not adequate. There is an urgent need to develop kinetic models that correctly describe space plasmas.

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