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Instability of Agyrotropic Electron Beams near the Electron Diffusion Region
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2017 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 119, no 2, article id 025101Article in journal (Refereed) Published
Abstract [en]

During a magnetopause crossing the Magnetospheric Multiscale spacecraft encountered an electron diffusion region (EDR) of asymmetric reconnection. The EDR is characterized by agyrotropic beam and crescent electron distributions perpendicular to the magnetic field. Intense upper-hybrid (UH) waves are found at the boundary between the EDR and magnetosheath inflow region. The UH waves are generated by the agyrotropic electron beams. The UH waves are sufficiently large to contribute to electron diffusion and scattering, and are a potential source of radio emission near the EDR. These results provide observational evidence of wave-particle interactions at an EDR, and suggest that waves play an important role in determining the electron dynamics.

Place, publisher, year, edition, pages
American Physical Society, 2017. Vol. 119, no 2, article id 025101
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Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-211336DOI: 10.1103/PhysRevLett.119.025101ISI: 000405367800008Scopus ID: 2-s2.0-85025452565OAI: oai:DiVA.org:kth-211336DiVA, id: diva2:1129108
Funder
Swedish National Space Board, 175/15
Note

QC 20170801

Available from: 2017-08-01 Created: 2017-08-01 Last updated: 2017-08-01Bibliographically approved

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