A statistical study of nightside inverted-V events using Freja electron data: implications for the current–voltage relationship

摘要: Abstract We study a set of 47 nightside inverted-V events using the Freja F7 (Two-dimensional Electron Spectrometer; TESP) electron detector. For each data point, we determine peak potential, source plasma density and temperature, field-aligned current density. show that temperature potential are correlated, which is in line with previous studies: on average 3.3 times smaller than eV , where V potential. On contrary, statistically quite independent Thus, based data, observational current–voltage relationship constant respect to voltage an sense. The formation parallel electric field, represented by voltage, more related current. Our results concern energies up 8.7 keV.