Journal article
Observations of a free-energy source for intense electrostatic waves (in upper atmosphere near upper hybrid resonance frequency)
Geophysical research letters, Vol.7(5), pp.293-296
05/1980
DOI: 10.1029/GL007i005p00293
Abstract
Significant progress has been made in understanding intense electrostatic waves near the upper hybrid resonance frequency in terms of the theory of multiharmonic cyclotron emission using a classical loss-cone distribution function as a model. Recent observations by Hawkeye 1 and GEOS 1 have verified the existence of loss-cone distributions in association with the intense electrostatic wave events, however, other observations by Hawkeye and ISEE have indicated that loss cones are not always observable during the wave events, and in fact other forms of free energy may also be responsible for the instability. Now, for the first time, a positively sloped feature in the perpendicular distribution function has been uniquely identified with intense electrostatic wave activity. Correspondingly, we suggest that the theory is flexible under substantial modifications of the model distribution function.
Details
- Title: Subtitle
- Observations of a free-energy source for intense electrostatic waves (in upper atmosphere near upper hybrid resonance frequency)
- Creators
- W KurthL FrankD GurnettB BurekM Ashour-Abdalla
- Resource Type
- Journal article
- Publication Details
- Geophysical research letters, Vol.7(5), pp.293-296
- DOI
- 10.1029/GL007i005p00293
- ISSN
- 0094-8276
- eISSN
- 1944-8007
- Language
- English
- Date published
- 05/1980
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984455551802771
Metrics
3 Record Views