Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019GL084843 |
MMS Observations of Plasma Heating Associated With FTE Growth | |
Akhavan-Tafti, M.1; Slavin, J. A.1; Sun, W. J.1; Le, G.2; Gershman, D. J.2 | |
2019-11-21 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:22页码:12654-12664 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Upon formation, flux transfer events (FTEs) in the subsolar magnetosheath have been observed to grow in diameter, lambda, while convecting along the magnetopause. Plasma pressure has also been found to decrease sub-adiabatically with increasing lambda, indicating the presence of internal plasma acceleration and heating processes. Here, the Magnetospheric Multiscale (MMS) fields and plasma measurements are used to determine the relative roles of parallel electric fields, betatron, and Fermi processes in plasma heating inside an ensemble of 55 subsolar FTEs. Plasma heating is shown asymmetric inside FTEs. Parallel electric fields dominate (>75%) ion and electron heating at the leading edge of FTEs. At the trailing edge, betatron and Fermi processes overtake (>50%), resulting in ion cooling and electron heating, respectively. The observed strong net heatings inside FTEs are proportional to lambda(-1/2). It is concluded that reconnection-driven heating continues inside FTEs far from the subsolar electron and ion diffusion regions. |
英文关键词 | FTE Growth Magnetic Reconnection Plasma Heating Parallel electric fields Betatron process Fermi process |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000497602600001 |
WOS关键词 | PARALLEL ELECTRIC-FIELDS ; MAGNETIC-FLUX TRANSFER ; PARTICLE-ACCELERATION ; ENERGETIC ELECTRONS ; GUIDE FIELD ; TRANSFER EVENTS ; NEUTRAL SHEET ; RECONNECTION ; GENERATION ; MAGNETOTAIL |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/225066 |
专题 | 环境与发展全球科技态势 |
作者单位 | 1.Univ Michigan, Climate & Space Sci & Engn, Ann Arbor, MI 48109 USA; 2.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA |
推荐引用方式 GB/T 7714 | Akhavan-Tafti, M.,Slavin, J. A.,Sun, W. J.,et al. MMS Observations of Plasma Heating Associated With FTE Growth[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(22):12654-12664. |
APA | Akhavan-Tafti, M.,Slavin, J. A.,Sun, W. J.,Le, G.,&Gershman, D. J..(2019).MMS Observations of Plasma Heating Associated With FTE Growth.GEOPHYSICAL RESEARCH LETTERS,46(22),12654-12664. |
MLA | Akhavan-Tafti, M.,et al."MMS Observations of Plasma Heating Associated With FTE Growth".GEOPHYSICAL RESEARCH LETTERS 46.22(2019):12654-12664. |
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