Finite gyroradius effects in the electron outflow of asymmetric magnetic reconnectionUppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutet för rymdfysik, Uppsalaavdelningen.
KTH Royal Inst Technol, Sch Elect Engn, Space & Plasma Phys, Stockholm, Sweden..
Univ Colorado, Lab Atmospher & Space Phys, Boulder, CO 80309 USA..
Austrian Acad Sci, Space Res Inst, Graz, Austria..
Univ Calif Los Angeles, Dept Earth & Space Sci, Los Angeles, CA USA..
Univ Calif Los Angeles, Dept Earth & Space Sci, Los Angeles, CA USA..
Univ New Hampshire, Ctr Space Sci, Durham, NH 03824 USA..
NASA, Goddard Space Flight Ctr, Greenbelt, MD USA..
NASA, Goddard Space Flight Ctr, Greenbelt, MD USA.;Univ Maryland, Dept Astron, College Pk, MD 20742 USA..
NASA, Goddard Space Flight Ctr, Greenbelt, MD USA..
NASA, Goddard Space Flight Ctr, Greenbelt, MD USA..
Univ Toulouse, Inst Rech Astrophys & Planetol, Toulouse, France.;CNRS, UMR 5277, Toulouse, France..
Inst Space & Astronaut Sci, JAXA, Sagamihara, Kanagawa, Japan..
NASA, Goddard Space Flight Ctr, Greenbelt, MD USA..
NASA, Goddard Space Flight Ctr, Greenbelt, MD USA..
Southwest Res Inst, San Antonio, TX USA..
Vise andre og tillknytning
2016 (engelsk)Inngår i: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 43, nr 13, s. 6724-6733Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]
We present observations of asymmetric magnetic reconnection showing evidence of electron demagnetization in the electron outflow. The observations were made at the magnetopause by the four Magnetospheric Multiscale (MMS) spacecraft, separated by approximate to 15km. The reconnecting current sheet has negligible guide field, and all four spacecraft likely pass close to the electron diffusion region just south of the X line. In the electron outflow near the X line, all four spacecraft observe highly structured electron distributions in a region comparable to a few electron gyroradii. The distributions consist of a core with T-vertical bar>T and a nongyrotropic crescent perpendicular to the magnetic field. The crescents are associated with finite gyroradius effects of partly demagnetized electrons. These observations clearly demonstrate the manifestation of finite gyroradius effects in an electron-scale reconnection current sheet.
sted, utgiver, år, opplag, sider
2016. Vol. 43, nr 13, s. 6724-6733
Emneord [en]
magnetic reconnection, electron demagnetization, finite gyroradius effects, electron diffusion region
HSV kategori
Identifikatorer
URN: urn:nbn:se:uu:diva-304453DOI: 10.1002/2016GL069205ISI: 000380901600006OAI: oai:DiVA.org:uu-304453DiVA, id: diva2:1033006
Forskningsfinansiär
Swedish National Space Board, 23/12:2 175/152016-10-052016-10-052017-11-30bibliografisk kontrollert
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