Electron precipitation in the morning sector of the auroral zone
Abstract
Auroral electron precipitation in the morning sector is discussed. The precipitation is assumed to be the result of an electro-magnetic cyclotron instability of a particle distribution that evolves adiabatically as its constituent electrons drift eastward from a source near midnight. The adiabatic distribution was calculated by Green's function methods in various magnetospheric field models, and the corresponding growth rates for whistler mode waves were calculated by the method of Kennel and Petschek. The region of maximum calculated wave growth corresponds spatially and temporally to the region of maximum observed electron precipitation only when the magnetospheric electric field is included realistically in the model.
- Publication:
-
Unknown
- Pub Date:
- May 1975
- Bibcode:
- 1975epms.rept.....J
- Keywords:
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- Auroral Zones;
- Diurnal Variations;
- Electron Precipitation;
- Adiabatic Conditions;
- Charged Particles;
- Green'S Functions;
- Magnetospheric Electron Density;
- Resonance;
- Whistlers;
- Geophysics