DOI: 10.1002/2017JA024761
Scopus记录号: 2-s2.0-85047566711
论文题名: Electron Physics in 3-D Two-Fluid 10-Moment Modeling of Ganymede's Magnetosphere
作者: Wang L. ; Germaschewski K. ; Hakim A. ; Dong C. ; Raeder J. ; Bhattacharjee A.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 4 起始页码: 2815
结束页码: 2830
语种: 英语
英文关键词: fluid simulation
; Galileo
; Ganymede
; kinetic simulation
; magnetic reconnection
; magnetosphere simulation
英文摘要: We studied the role of electron physics in 3-D two-fluid 10-moment simulation of Ganymede's magnetosphere. The model captures nonideal physics like the Hall effect, electron inertia, and anisotropic, nongyrotropic pressure effects. A series of analyses were carried out: (1) The resulting magnetic field topology and electron and ion convection patterns were investigated. The magnetic fields were shown to agree reasonably well with in situ measurements by the Galileo satellite. (2) The physics of collisionless magnetic reconnection were carefully examined in terms of the current sheet formation and decomposition of generalized Ohm's law. The importance of pressure anisotropy and nongyrotropy in supporting the reconnection electric field is confirmed. (3) We compared surface “brightness” morphology, represented by surface electron and ion pressure contours, with oxygen emission observed by the Hubble Space Telescope. The correlation between the observed emission morphology and spatial variability in electron/ion pressure was demonstrated. Potential extension to multi-ion species in the context of Ganymede and other magnetospheric systems is also discussed. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114126
Appears in Collections: 气候减缓与适应
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作者单位: Space Science Center, University of New Hampshire, Durham, NH, United States; Princeton Center for Heliophysics, Princeton Plasma Physics Laboratory, Princeton University, Princeton, NJ, United States; Department of Astrophysical Sciences, Princeton University, Princeton, NJ, United States
Recommended Citation:
Wang L.,Germaschewski K.,Hakim A.,et al. Electron Physics in 3-D Two-Fluid 10-Moment Modeling of Ganymede's Magnetosphere[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(4)