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题名: GLOBAL DISTRIBUTION OF THE KINETIC SCALE MAGNETIC TURBULENCE AROUND THE MOON
作者: Luo, Q. Y.1, 2; Yang Lei(杨磊)1, 3; Ji, J. H.1, 2
刊名: ASTROPHYSICAL JOURNAL LETTERS
出版日期: 2016
卷号: 816, 期号:1
关键词: magnetic fields ; methods: data analysis ; Moon ; plasmas ; solar wind ; turbulence
DOI: 10.3847/2041-8205/816/1/L3
文章类型: Article
英文摘要: The Moon-solar wind interaction results in the formation of a complicated lunar space plasma environment. Here, we investigate the solar wind turbulence around the Moon using the magnetic field observed by the dual-probe mission Acceleration, Reconnection, Turbulence and Electrodynamics of the Moon's Interaction with the Sun (ARTEMIS). Structure functions in a time range on kinetic scales are computed to measure the scaling index., the spatial distribution of which reveals the global aspects of the lunar space plasma and shows the dependence on the local instability. On the lunar nightside, in the plasma void, the dominating magnetic pressure over the thermal pressure restrains the turbulence, and a quiet zone is built with xi << xi(0), where xi(0) = 0.36 is the scaling index in the ambient solar wind. Downstream in the lunar wake, xi is elevated gradually and goes above xi(0) at a radial distance of similar to 3R(m) (lunar radius), which implies that the plasma refilling process in the lunar wake begins to generate the local turbulence. On the dayside around the subsolar point, xi is enhanced at a low altitude of similar to 200 km, where the solar wind turbulence might be strengthened due to interaction with the lunar source plasma. The largest scaling indices lie around the day-night terminator with xi > 0.65, and the observed dawn-dusk asymmetry could be an effect of the magnetic field not being parallel with the solar wind. The correspondence between the enhanced scaling index and the local instability also raises new questions about the description of solar wind turbulence.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: SOLAR-WIND TURBULENCE ; PLASMA ; INTERMITTENCY ; SURFACE ; WAKE
收录类别: SCI
项目资助者: National Natural Science Foundation of China (NSFC)(11173061) ; Specialized Research Fund for State Key Laboratories ; Foundation of Minor Planets of the Purple Mountain Observatory ; NSFC(11473073) ; Strategic Priority Research Program-The Emergence of Cosmological Structures of CAS(XDB09000000) ; NASA(NAS5-02099) ; German Ministry for Economy and Technology ; German Center for Aviation and Space (DLR)(50 OC 0302)
语种: 英语
WOS记录号: WOS:000369369900003
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16124
Appears in Collections:太阳和太阳系等离子体研究团组_期刊论文

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作者单位: 1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
2.Chinese Acad Sci, Key Lab Planetary Sci, Nanjing 210008, Peoples R China
3.Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing 100190, Peoples R China
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