PMO OpenIR  > 太阳活动的多波段观测研究团组
On the envelope soliton below the H + gyrofrequency in low auroral region
De-Yu Wang ; Guang-Li Huang ; Falthammar, C.-G.
2002
Source PublicationAstrophysics and Space Science
ISSN0004-640X
Volume282Issue:2Pages:421-432
AbstractTwo envelope soliton events below the H + gyrofrequency with localized density depletion were discovered in the low auroral region (~ 1760 km) by the Freja satellite. These events were correlated in time with the observations of the ratio of the oxygen ion density to hydrogen ion density sharp increase and the electrons energization. These envelope solitons have a characteristic frequency at ~ 180-190 Hz, which are obviously different from the electron-ion lower hybrid wave frequency and the helium ion gyrofrequency in low auroral plasma, but it is close to the resonance frequency of the hydrogen ion-oxygen ion hybrid wave. A modulational instability model of an ion-ion hybrid wave is discussed here. It is found that the envelope soliton below the H + gyrofrequency in the low auroral region may be generated by this modulational instability on condition that the local oxygen ion density is larger than the local hydrogen ion density
KeywordLower-hybrid Waves Freja Observations Ion-acceleration Electron-precipitation Elf Waves Plasma Ionosphere
Subject AreaAstronomy & Astrophysics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/7909
Collection太阳活动的多波段观测研究团组
Recommended Citation
GB/T 7714
De-Yu Wang,Guang-Li Huang,Falthammar, C.-G.. On the envelope soliton below the H + gyrofrequency in low auroral region[J]. Astrophysics and Space Science,2002,282(2):421-432.
APA De-Yu Wang,Guang-Li Huang,&Falthammar, C.-G..(2002).On the envelope soliton below the H + gyrofrequency in low auroral region.Astrophysics and Space Science,282(2),421-432.
MLA De-Yu Wang,et al."On the envelope soliton below the H + gyrofrequency in low auroral region".Astrophysics and Space Science 282.2(2002):421-432.
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