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DOI | 10.1038/nature25750 |
Electron magnetic reconnection without ion coupling in Earth's turbulent magnetosheath | |
Phan, T. D.1; Eastwood, J. P.2; Shay, M. A.3; Drake, J. F.4; Sonnerup, B. U. O.5; Fujimoto, M.6; Cassak, P. A.7; Oieroset, M.1; Burch, J. L.8; Torbert, R. B.9; Rager, A. C.10,11; Dorelli, J. C.11; Gershman, D. J.11; Pollock, C.12; Pyakurel, P. S.3; Haggerty, C. C.3; Khotyaintsev, Y.13; Lavraud, B.14; Saito, Y.6; Oka, M.1; Ergun, R. E.15; Retino, A.16; Le Contel, O.16; Argall, M. R.9; Giles, B. L.11; Moore, T. E.11; Wilder, F. D.15; Strangeway, R. J.17; Russell, C. T.17; Lindqvist, P. A.18; Magnes, W.19 | |
2018-05-10 | |
发表期刊 | NATURE
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ISSN | 0028-0836 |
EISSN | 1476-4687 |
出版年 | 2018 |
卷号 | 557期号:7704页码:202-+ |
文章类型 | Article |
语种 | 英语 |
国家 | USA; England; Japan; Sweden; France; Austria |
英文摘要 | Magnetic reconnection in current sheets is a magnetic-to-particle energy conversion process that is fundamental to many space and laboratory plasma systems. In the standard model of reconnection, this process occurs in a minuscule electron-scale diffusion region(1,2). On larger scales, ions couple to the newly reconnected magnetic-field lines and are ejected away from the diffusion region in the form of bi-directional ion jets at the ion Alfven speed(3-5). Much of the energy conversion occurs in spatially extended ion exhausts downstream of the diffusion region(6). In turbulent plasmas, which contain a large number of small-scale current sheets, reconnection has long been suggested to have a major role in the dissipation of turbulent energy at kinetic scales(7-11). However, evidence for reconnection plasma jetting in small-scale turbulent plasmas has so far been lacking. Here we report observations made in Earth's turbulent magnetosheath region (downstream of the bow shock) of an electron-scale current sheet in which diverging bi-directional super-ion-Alfvenic electron jets, parallel electric fields and enhanced magnetic-to-particle energy conversion were detected. Contrary to the standard model of reconnection, the thin reconnecting current sheet was not embedded in a wider ion-scale current layer and no ion jets were detected. Observations of this and other similar, but unidirectional, electron jet events without signatures of ion reconnection reveal a form of reconnection that can drive turbulent energy transfer and dissipation in electron-scale current sheets without ion coupling. |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000431775100042 |
WOS关键词 | CURRENT SHEET ; SOLAR-WIND ; MAGNETOPAUSE ; PLASMA ; MMS ; ACCELERATION ; REGION |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
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/202852 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA; 2.Imperial Coll London, Blackett Lab, London, England; 3.Univ Delaware, Newark, DE USA; 4.Univ Maryland, College Pk, MD 20742 USA; 5.Dartmouth Coll, Hanover, NH 03755 USA; 6.JAXA, ISAS, Sagamihara, Kanagawa, Japan; 7.West Virginia Univ, Morgantown, WV USA; 8.Southwest Res Inst, San Antonio, TX USA; 9.Univ New Hampshire, Durham, NH 03824 USA; 10.Catholic Univ Amer, Washington, DC 20064 USA; 11.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA; 12.Denali Sci, Healy, AK USA; 13.Swedish Inst Space Phys, Uppsala, Sweden; 14.Univ Toulouse, Inst Rech Astrophys & Planetol, Toulouse, France; 15.Univ Colorado, LASP, Boulder, CO 80309 USA; 16.Ecole Polytech, CNRS, Paris, France; 17.Univ Calif Los Angeles, Los Angeles, CA USA; 18.Royal Inst Technol, Stockholm, Sweden; 19.Austrian Acad Sci, Space Res Inst, Graz, Austria |
推荐引用方式 GB/T 7714 | Phan, T. D.,Eastwood, J. P.,Shay, M. A.,et al. Electron magnetic reconnection without ion coupling in Earth's turbulent magnetosheath[J]. NATURE,2018,557(7704):202-+. |
APA | Phan, T. D..,Eastwood, J. P..,Shay, M. A..,Drake, J. F..,Sonnerup, B. U. O..,...&Magnes, W..(2018).Electron magnetic reconnection without ion coupling in Earth's turbulent magnetosheath.NATURE,557(7704),202-+. |
MLA | Phan, T. D.,et al."Electron magnetic reconnection without ion coupling in Earth's turbulent magnetosheath".NATURE 557.7704(2018):202-+. |
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