Van Allen Probes observation of plasmaspheric hiss modulated by injected energetic electrons

Autor: R. Shi, W. Li, Q. Ma, S. G. Claudepierre, C. A. Kletzing, W. S. Kurth, G. B. Hospodarsky, H. E. Spence, G. D. Reeves, J. F. Fennell, J. B. Blake, S. A. Thaller, J. R. Wygant
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Zdroj: Annales Geophysicae, Vol 36, Pp 781-791 (2018)
Druh dokumentu: article
ISSN: 0992-7689
1432-0576
DOI: 10.5194/angeo-36-781-2018
Popis: 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 (L shells.
Databáze: Directory of Open Access Journals
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