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DOI | 10.1029/2019GL082471 |
High-Frequency Wave Generation in Magnetotail Reconnection: Linear Dispersion Analysis | |
Burch, J. L.1; Dokgo, K.1; Hwang, K. J.1; Torbert, R. B.1,2; Graham, D. B.3; Webster, J. M.4; Ergun, R. E.5; Giles, B. L.6; Allen, R. C.7; Chen, L-J6; Wang, S.8; Genestreti, K. J.2; Russell, C. T.9; Strangeway, R. J.9; Le Contel, O.10 | |
2019-04-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:8页码:4089-4097 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Sweden; France |
英文摘要 | Plasma and wave measurements from the NASA Magnetospheric Multiscale mission are presented for magnetotail reconnection events on 3 July and 11 July 2017. Linear dispersion analyses were performed using distribution functions comprising up to six drifting bi-Maxwellian distributions. In both events electron crescent-shaped distributions are shown to be responsible for upper hybrid waves near the X-line. In an adjacent location within the 3 July event a monodirectional field-aligned electron beam drove parallel-propagating beam-mode waves. In the 11 July event an electron distribution consisting of a drifting core and two crescents was shown to generate upper-hybrid and beam-mode waves at three different frequencies, explaining the observed broadband waves. Multiple harmonics of the upper hybrid waves were observed but cannot be explained by the linear dispersion analysis since they result from nonlinear beam interactions. Plain Language Summary Magnetic reconnection is a process that occurs throughout the universe in ionized gases (plasmas) containing embedded magnetic fields. This process converts magnetic energy to electron and ion energy, causing phenomena such as solar flares and auroras. The NASA Magnetospheric Multiscale mission has shown that in magnetic reconnection regions there are intense electric field oscillations or waves and that electrons form crescent and beam-like populations propagating both along and perpendicular to the magnetic field. This study shows that the observed electron populations are responsible for high-frequency waves including their propagation directions and frequency ranges. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000467949200003 |
WOS关键词 | MAGNETIC RECONNECTION ; ENERGY-CONVERSION ; PLASMA FREQUENCY ; BEAM-PLASMA ; ELECTRON ; REGION |
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/182490 |
专题 | 气候变化 |
作者单位 | 1.Southwest Res Inst, San Antonio, TX 78238 USA; 2.Univ New Hampshire, Dept Phys, Durham, NH 03824 USA; 3.Swedish Inst Space Phys, Uppsala, Sweden; 4.Rice Univ, Dept Phys & Astron, Houston, TX USA; 5.Univ Colorado, LASP, Boulder, CO 80309 USA; 6.NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA; 7.Johns Hopkins Univ, Appl Phys Lab, Laurel, MD USA; 8.Univ Maryland, Dept Astron, College Pk, MD 20742 USA; 9.Univ Calif Los Angeles, Earth & Planetary Sci, Los Angeles, CA USA; 10.Univ Paris Sud, Observ Paris, Sorbonne Univ, Lab Phys Plasmas,CNRS,Ecole Polytech, Paris, France |
推荐引用方式 GB/T 7714 | Burch, J. L.,Dokgo, K.,Hwang, K. J.,et al. High-Frequency Wave Generation in Magnetotail Reconnection: Linear Dispersion Analysis[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(8):4089-4097. |
APA | Burch, J. L..,Dokgo, K..,Hwang, K. J..,Torbert, R. B..,Graham, D. B..,...&Le Contel, O..(2019).High-Frequency Wave Generation in Magnetotail Reconnection: Linear Dispersion Analysis.GEOPHYSICAL RESEARCH LETTERS,46(8),4089-4097. |
MLA | Burch, J. L.,et al."High-Frequency Wave Generation in Magnetotail Reconnection: Linear Dispersion Analysis".GEOPHYSICAL RESEARCH LETTERS 46.8(2019):4089-4097. |
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