Journal article
Van Allen Probes observation of plasmaspheric hiss modulated by injected energetic electrons
Annales Geophysicae, Vol.36(3), pp.781-791
05/23/2018
DOI: 10.5194/angeo-36-781-2018
Abstract
Plasmaspheric hiss was observed by Van Allen Probe B in association with energetic electron injections in the outer plasmasphere. The energy of injected electrons coincides with the minimum resonant energy calculated for the observed hiss wave frequency. Interestingly, the variations in hiss wave intensity, electron flux and ultra low frequency (ULF) wave intensity exhibit remarkable correlations, while plasma density is not correlated with any of these parameters. Our study provides direct evidence for the first time that the injected anisotropic electron population, which is modulated by ULF waves, modulates the hiss intensity in the outer plasmasphere. This also implies that the plasmaspheric hiss observed by Van Allen Probe B in the outer plasmasphere (L > ∼ 5.5) is locally amplified. Meanwhile, Van Allen Probe A observed hiss emission at lower L shells (< 5), which was not associated with electron injections but primarily modulated by the plasma density. The features observed by Van Allen Probe A suggest that the observed hiss deep inside the plasmasphere may have propagated from higher L shells.
Details
- Title: Subtitle
- Van Allen Probes observation of plasmaspheric hiss modulated by injected energetic electrons
- Creators
- Run Shi - Boston UniversityWen Li - Boston UniversityQianli Ma - Boston UniversitySeth G Claudepierre - The Aerospace CorporationCraig A Kletzing - University of IowaWilliam S Kurth - University of IowaGeorge B Hospodarsky - University of IowaHarlan E Spence - University of New HampshireGeoff D Reeves - Los Alamos National LaboratoryJoseph F Fennell - The Aerospace CorporationJ. Bernard Blake - The Aerospace CorporationScott A Thaller - University of MinnesotaJohn R Wygant - University of Minnesota
- Resource Type
- Journal article
- Publication Details
- Annales Geophysicae, Vol.36(3), pp.781-791
- DOI
- 10.5194/angeo-36-781-2018
- ISSN
- 1432-0576
- eISSN
- 1432-0576
- Language
- English
- Date published
- 05/23/2018
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984199950402771
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