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  • Phan, T. D.Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. (author)

Electron magnetic reconnection without ion coupling in Earth's turbulent magnetosheath

  • Article/chapterEnglish2018

Publisher, publication year, extent ...

  • 2018-05-09
  • NATURE PUBLISHING GROUP,2018
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:kth-228425
  • https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-228425URI
  • https://doi.org/10.1038/s41586-018-0091-5DOI
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-356492URI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • QC 20180529
  • 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.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Eastwood, J. P.Imperial Coll London, Blackett Lab, London, England. (author)
  • Shay, M. A.Univ Delaware, Newark, DE USA. (author)
  • Drake, J. F.Univ Maryland, College Pk, MD 20742 USA. (author)
  • Sonnerup, B. U. O.Dartmouth Coll, Hanover, NH 03755 USA. (author)
  • Fujimoto, M.JAXA, ISAS, Sagamihara, Kanagawa, Japan. (author)
  • Cassak, P. A.West Virginia Univ, Morgantown, WV USA.,Denali Sci, Healy, AK USA (author)
  • Oieroset, M.Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. (author)
  • Burch, J. L.Southwest Res Inst, San Antonio, TX USA.,Univ Toulouse, Inst Rech Astrophys & Planetol, Toulouse, France (author)
  • Torbert, R. B.Univ New Hampshire, Durham, NH 03824 USA. (author)
  • Rager, A. C.Catholic Univ Amer, Washington, DC 20064 USA.;NASA, Goddard Space Flight Ctr, Greenbelt, MD USA. (author)
  • Dorelli, J. C.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA. (author)
  • Gershman, D. J.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA. (author)
  • Pollock, C.Denali Sci, Healy, AK USA. (author)
  • Pyakurel, P. S.Univ Delaware, Newark, DE USA. (author)
  • Haggerty, C. C.Univ Delaware, Newark, DE USA. (author)
  • Khotyaintsev, Yuri V.Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen,Swedish Inst Space Phys, Uppsala, Sweden(Swepub:uu)ykh28990 (author)
  • Lavraud, B.Univ Toulouse, Inst Rech Astrophys & Planetol, Toulouse, France.,NASA, Goddard Space Flight Ctr, Greenbelt, MD USA (author)
  • Saito, Y.JAXA, ISAS, Sagamihara, Kanagawa, Japan. (author)
  • Oka, M.Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. (author)
  • Ergun, R. E.Univ Colorado, LASP, Boulder, CO 80309 USA. (author)
  • Retino, A.Ecole Polytech, CNRS, Paris, France.,Univ New Hampshire, Durham, NH USA (author)
  • Le Contel, O.Ecole Polytech, CNRS, Paris, France. (author)
  • Argall, M. R.Univ New Hampshire, Durham, NH 03824 USA. (author)
  • Giles, B. L.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA. (author)
  • Moore, T. E.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA. (author)
  • Wilder, F. D.Univ Colorado, LASP, Boulder, CO 80309 USA. (author)
  • Strangeway, R. J.Univ Calif Los Angeles, Los Angeles, CA USA. (author)
  • Russell, C. T.Univ Calif Los Angeles, Los Angeles, CA USA. (author)
  • Lindqvist, Per-ArneKTH,Rymd- och plasmafysik,Royal Inst Technol, Stockholm, Sweden(Swepub:kth)u1yukyk9 (author)
  • Magnes, W.Austrian Acad Sci, Space Res Inst, Graz, Austria. (author)
  • Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.Imperial Coll London, Blackett Lab, London, England. (creator_code:org_t)

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  • In:Nature: NATURE PUBLISHING GROUP557:7704, s. 202-+0028-08361476-4687

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