Field Line Dependence of the Mass Density and Electron Density

Details Field Line Dependence of the Mass Density and Electron Density Field Line Dependence of the Mass Density and Electron Density

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsm21a0458d&link_type=abstract

American Geophysical Union, Fall Meeting 2004, abstract #SM21A-0458

Other

2730 Magnetosphere: Inner, 2740 Magnetospheric Configuration And Dynamics, 2752 Mhd Waves And Instabilities, 2768 Plasmasphere, 2794 Instruments And Techniques

Scientific paper

Based on the harmonic frequencies of the field line resonance mode, the typical field line dependence of the mass density is locally peaked at the magnetic equator. In situ measurements of the electron density by the Polar spacecraft have not yet shown such a local peak. Rather they indicate that the electron density decreases as the magnetic equator is approached. On the other hand, there is a considerable uncertainty in the inferred mass density, and most of the electron density values at large L measured by Polar are at high latitude. Here we examine the uncertainties in the field line dependence based on these two approaches in order to see if the results could be consistent, or if it is necessary to hypothesize a population of heavy ions localized to the magnetic equator.

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