globalchange  > 科学计划与规划
DOI: 10.1002/2015GL067040
论文题名:
MAVEN observations of energy-time dispersed electron signatures in Martian crustal magnetic fields
作者: Harada Y.; Mitchell D.L.; Halekas J.S.; McFadden J.P.; Mazelle C.; Connerney J.E.P.; Espley J.; Brain D.A.; Larson D.E.; Lillis R.J.; Hara T.; Livi R.; Dibraccio G.A.; Ruhunusiri S.; Jakosky B.M.
刊名: Geophysical Research Letters
ISSN: 0094-9390
EISSN: 1944-9121
出版年: 2016
卷: 43, 期:3
起始页码: 939
结束页码: 944
语种: 英语
英文关键词: crustal magnetic fields ; electrons ; energy-time dispersion ; Mars ; MAVEN
Scopus关键词: Dispersions ; Hot electrons ; Magnetic fields ; Magnetism ; Magnetosphere ; Plasma theory ; Crustal magnetic fields ; Electron signatures ; Energy-time ; Mars ; MAVEN ; Pitch angle distribution ; Trapped electrons ; Volatile evolution ; Electrons ; dispersion ; electron ; magnetic field ; magnetosphere ; Mars ; observational method
英文摘要: Energy-time dispersed electron signatures are observed by the Mars Atmosphere and Volatile EvolutioN (MAVEN) mission in the vicinity of strong Martian crustal magnetic fields. Analysis of pitch angle distributions indicates that these dispersed electrons are typically trapped on closed field lines formed above strong crustal magnetic sources. Most of the dispersed electron signatures are characterized by peak energies decreasing with time rather than increasing peak energies. These properties can be explained by impulsive and local injection of hot electrons into closed field lines and subsequent dispersion by magnetic drift of the trapped electrons. In addition, the dispersed flux enhancements are often bursty and sometimes exhibit clear periodicity, suggesting that the injection and trapping processes are intrinsically time dependent and dynamic. These MAVEN observations demonstrate that common physical processes can operate in both global intrinsic magnetospheres and local crustal magnetic fields. © 2016. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84959506620&doi=10.1002%2f2015GL067040&partnerID=40&md5=35f632895765e39d90568eabc561c1de
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10353
Appears in Collections:科学计划与规划
气候变化与战略

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作者单位: Space Sciences Laboratory, University of California, Berkeley, CA, United States

Recommended Citation:
Harada Y.,Mitchell D.L.,Halekas J.S.,et al. MAVEN observations of energy-time dispersed electron signatures in Martian crustal magnetic fields[J]. Geophysical Research Letters,2016-01-01,43(3).
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