PMO OpenIR  > 太阳和太阳系等离子体研究团组
Generation mechanism of electrostatic solitary structures in the Earth's auroral region
Lu, QM; Wang, DY; Wang, S
2005-03-29
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
ISSN0148-0227
Volume110Issue:A3Pages:A03223
Abstract[ 1] Satellite observations have revealed electrostatic solitary structures in the Earth's auroral region. These structures have positive electrostatic potentials and move along the ambient magnetic field. In this paper we performed one-dimensional electrostatic particle simulations of electrostatic solitary waves (ESW) in plasma composed of three electron components: cold, hot, and beam electrons. First, the nearly monochromatic electrostatic acoustic waves are excited. When the amplitude of the electron acoustic ( EA) waves is sufficiently large, part of hot and beam electrons are trapped by the electron acoustic waves. These waves coalesce each other during their nonlinear evolution, and at last the solitary structures with travel speed related to the beam velocity are formed at the quasi-equilibrium stage. These structures have positive potential signatures, and they seem to be stable. Electron density cavities for cold electron component are always accompanied with these structures. In addition, the corresponding electric fields have a bipolar structure, which has also been observed in the Earth's auroral region recently. The conditions for existence of such solitary structures are investigated through our simulations, and the comparisons between our simulated results and satellite observations in the Earth's auroral regions are also discussed.
KeywordElectric-field Structures Phase-space Holes Acoustic Solitons Polar Cusp Satellite-observations Double-layers Waves Plasma Noise Magnetotail
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1029/2004JA010739
WOS KeywordELECTRIC-FIELD STRUCTURES ; PHASE-SPACE HOLES ; ACOUSTIC SOLITONS ; POLAR CUSP ; SATELLITE-OBSERVATIONS ; DOUBLE-LAYERS ; WAVES ; PLASMA ; NOISE ; MAGNETOTAIL
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000228370400004
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/4128
Collection太阳和太阳系等离子体研究团组
Affiliation1.Univ Sci & Technol China, Sch Earth & Space Sci, Hefei 230026, Anhui, Peoples R China
2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Lu, QM,Wang, DY,Wang, S. Generation mechanism of electrostatic solitary structures in the Earth's auroral region[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2005,110(A3):A03223.
APA Lu, QM,Wang, DY,&Wang, S.(2005).Generation mechanism of electrostatic solitary structures in the Earth's auroral region.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,110(A3),A03223.
MLA Lu, QM,et al."Generation mechanism of electrostatic solitary structures in the Earth's auroral region".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 110.A3(2005):A03223.
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