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  Two-stage Electron Acceleration by 3D Collisionless Guide-field Magnetic Reconnection

Muñoz Sepúlveda, P. A., & Büchner, J. (2018). Two-stage Electron Acceleration by 3D Collisionless Guide-field Magnetic Reconnection. The Astrophysical Journal, 864(1): 92. doi:10.3847/1538-4357/aad5e9.

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 Urheber:
Muñoz Sepúlveda, Patricio A.1, Autor           
Büchner, Jörg1, Autor           
Affiliations:
1Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832289              

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Schlagwörter: acceleration of particles; magnetic reconnection; plasmas
 MPIS_GROUPS: Theory and Simulation of Solar System Plasmas
 MPIS_PROJECTS: Theory: Sim Sol Sys Plasma
 Zusammenfassung: We report a newly found two-stage mechanism of electron acceleration near X-lines of 3D collisionless guide-field magnetic reconnection in the nonrelativistic regime typical, e.g., for stellar coronae. We found that after electrons are first pre-accelerated during the linear growth of reconnection, they become additionally accelerated in the course of the nonlinear stage of 3D guide-field magnetic reconnection. This additional acceleration is due to the filamentation of electric and magnetic fields caused by streaming instabilities. In addition to enhanced parallel electric fields, the filamentation leads to additional curvature-driven electron acceleration in the guide-field direction. As a result, part of the accelerated electron spectra becomes a power law with a spectral index of ~−1.6 near the X-line. This second stage of acceleration due to nonlinear reconnection is relevant for the production of energetic electrons in, e.g., thin current sheets of stellar coronae.

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Sprache(n): eng - English
 Datum: 2018-09-112018
 Publikationsstatus: Online veröffentlicht
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.3847/1538-4357/aad5e9
 Art des Abschluß: -

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Titel: The Astrophysical Journal
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: Bristol; Vienna : IOP Publishing; IAEA
Seiten: - Band / Heft: 864 (1) Artikelnummer: 92 Start- / Endseite: - Identifikator: ISSN: 0004-637X
CoNE: https://pure.mpg.de/cone/journals/resource/954922828215_3