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In situ spacecraft observations of a structured electron diffusion region during magnetopause reconnection

Cozzani, Giulia (author)
Univ Paris Sud, Sorbonne Univ, Observ Paris, Lab Phys Plasmas,CNRS,Ecole Polytech, F-91128 Palaiseau, France.;Univ Pisa, Dipartimento Fis E Fermi, I-56127 Pisa, Italy.
Retino, A. (author)
Univ Paris Sud, Sorbonne Univ, Observ Paris, Lab Phys Plasmas,CNRS,Ecole Polytech, F-91128 Palaiseau, France.
Califano, F. (author)
Univ Pisa, Dipartimento Fis E Fermi, I-56127 Pisa, Italy.,Univ Paris Sud, Sorbonne Univ, Observ Paris, Lab Phys Plasmas,CNRS,Ecole Polytech, F-91128 Palaiseau, France;Univ Calabria, Dipartimento Fis, I-87036 Arcavacata Di Rende, CS, Italy
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Alexandrova, A. (author)
Univ Paris Sud, Sorbonne Univ, Observ Paris, Lab Phys Plasmas,CNRS,Ecole Polytech, F-91128 Palaiseau, France.,KTH Royal Inst Technol, SE-10044 Stockholm, Sweden
Contel, O. Le (author)
Univ Paris Sud, Sorbonne Univ, Observ Paris, Lab Phys Plasmas,CNRS,Ecole Polytech, F-91128 Palaiseau, France.
Khotyaintsev, Yuri V. (author)
Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen
Vaivads, Andris (author)
Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen
Fu, H. S. (author)
Beihang Univ, Sch Space & Environm, Beijing 100083, Peoples R China.
Catapano, F. (author)
Univ Paris Sud, Sorbonne Univ, Observ Paris, Lab Phys Plasmas,CNRS,Ecole Polytech, F-91128 Palaiseau, France.;Univ Calabria, Dipartimento Fis, I-87036 Arcavacata Di Rende, CS, Italy.
Breuillard, H. (author)
Univ Paris Sud, Sorbonne Univ, Observ Paris, Lab Phys Plasmas,CNRS,Ecole Polytech, F-91128 Palaiseau, France.;Univ Orleans, UMR 7328, CNRS, Lab Phys & Chim Environm & Espace, F-45071 Orleans, France.,Johns Hopkins Univ, Appl Phys Lab, Johns Hopkins Rd, Laurel, MD 20723 USA
Ahmadi, N. (author)
Univ Colorado, Lab Atmospher & Space Phys, Boulder, CO 80309 USA.
Lindqvist, Per-Arne (author)
KTH,Rymd- och plasmafysik
Ergun, R. E. (author)
Univ Colorado, Lab Atmospher & Space Phys, Boulder, CO 80309 USA.
Torbert, R. B. (author)
Univ New Hampshire, Space Sci Ctr, Durham, NH 03824 USA.
Giles, B. L. (author)
NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
Russell, C. T. (author)
Univ Calif Los Angeles, Dept Earth & Space Sci, Los Angeles, CA 90095 USA.
Nakamura, R. (author)
Austrian Acad Sci, Space Res Inst, A-8042 Graz, Austria.
Fuseher, S. (author)
Southwest Res Inst, San Antonio, TX 78238 USA.;Univ Texas San Antonio, San Antonio, TX 78238 USA.
Mauk, B. H. (author)
Johns Hopkins Univ, Appl Phys Lab, Johns Hopkins Rd, Laurel, MD 20723 USA.
Moore, T. (author)
NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
Burch, J. L. (author)
Southwest Res Inst, San Antonio, TX 78238 USA.
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Univ Paris Sud, Sorbonne Univ, Observ Paris, Lab Phys Plasmas,CNRS,Ecole Polytech, F-91128 Palaiseau, France;Univ Pisa, Dipartimento Fis E Fermi, I-56127 Pisa, Italy. Univ Paris Sud, Sorbonne Univ, Observ Paris, Lab Phys Plasmas,CNRS,Ecole Polytech, F-91128 Palaiseau, France. (creator_code:org_t)
AMER PHYSICAL SOC, 2019
2019
English.
In: Physical review. E. - : AMER PHYSICAL SOC. - 2470-0045 .- 2470-0053. ; 99:4
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • The electron diffusion region (EDR) is the region where magnetic reconnection is initiated and electrons are energized. Because of experimental difficulties, the structure of the EDR is still poorly understood. A key question is whether the EDR has a homogeneous or patchy structure. Here we report Magnetospheric Multiscale (MMS) spacecraft observations providing evidence of inhomogeneous current densities and energy conversion over a few electron inertial lengths within an EDR at the terrestrial magnetopause, suggesting that the EDR can be rather structured. These inhomogenenities are revealed through multipoint measurements because the spacecraft separation is comparable to a few electron inertial lengths, allowing the entire MMS tetrahedron to be within the EDR most of the time. These observations are consistent with recent high-resolution and low-noise kinetic simulations.

Subject headings

NATURVETENSKAP  -- Fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences (hsv//eng)
NATURVETENSKAP  -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)

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