Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018GL080449 |
Evidence of Magnetic Nulls in Electron Diffusion Region | |
Fu, H. S.1; Cao, J. B.1; Cao, D.1; Wang, Z.1; Vaivads, A.2; Khotyaintsev, Y. V.2; Burch, J. L.3; Huang, S. Y.4 | |
2019-01-16 | |
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:1页码:48-54 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; Sweden; USA |
英文摘要 | Theoretically, magnetic reconnectionthe process responsible for solar flares and magnetospheric substormsoccurs at the X-line or radial null in the electron diffusion region (EDR). However, whether this theory is correct is unknown, because the radial null (X-line) has never been observed inside the EDR due to the lack of efficient techniques and the scarcity of EDR measurements. Here we report such evidence, using data from the recent MMS mission and the newly developed First-Order Taylor Expansion (FOTE) Expansion technique. We investigate 12 EDR candidates at the Earth's magnetopause and find radial nulls (X-lines) in all of them. In some events, spacecraft are only 3km (one electron inertial length) away from the null. We reconstruct the magnetic topology of these nulls and find it agrees well with theoretical models. These nulls, as reconstructed for the first time inside the EDR by the FOTE technique, indicate that the EDR is active and the reconnection process is ongoing. Plain Language Summary Magnetic reconnection is a key process responsible for many explosive phenomena in nature such as solar flares and magnetospheric substorms. Theoretically, such process occurs at the X-line or radial null in the electron diffusion region (EDR). However, whether this theory is correct is still unknown, because the radial null (X-line) has never been observed inside the EDR due to the lack of efficient technique and the scarcity of EDR measurements. Here we report such evidence, using data from the recent MMS mission and the newly developed FOTE technique. |
英文关键词 | Electron diffusion region Magnetic null Magnetic reconnection FOTE method Magnetic topology Reconstruction |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000456938600006 |
WOS关键词 | RECONNECTION ; MAGNETOPAUSE ; FIELDS ; WAVES |
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/27816 |
专题 | 气候变化 |
作者单位 | 1.Beihang Univ, Sch Space & Environm, Beijing, Peoples R China; 2.Swedish Inst Space Phys, Uppsala, Sweden; 3.Southwest Res Inst, San Antonio, TX USA; 4.Wuhan Univ, Sch Elect & Informat, Wuhan, Hubei, Peoples R China |
推荐引用方式 GB/T 7714 | Fu, H. S.,Cao, J. B.,Cao, D.,et al. Evidence of Magnetic Nulls in Electron Diffusion Region[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(1):48-54. |
APA | Fu, H. S..,Cao, J. B..,Cao, D..,Wang, Z..,Vaivads, A..,...&Huang, S. Y..(2019).Evidence of Magnetic Nulls in Electron Diffusion Region.GEOPHYSICAL RESEARCH LETTERS,46(1),48-54. |
MLA | Fu, H. S.,et al."Evidence of Magnetic Nulls in Electron Diffusion Region".GEOPHYSICAL RESEARCH LETTERS 46.1(2019):48-54. |
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