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Electron trapping in the coma of a weakly outgassing comet
KTH, School of Electrical Engineering and Computer Science (EECS), Computer Science, Computational Science and Technology (CST).ORCID iD: 0000-0003-4236-768X
St Petersburg State Univ, Dept Phys, St Petersburg 198504, Russia..
Univ Colorado, LASP, Boulder, CO 80303 USA.;NASA, Inst Modeling Plasma Atmospheres & Cosm Dust, SSERVI, Moffett Field, CA 94035 USA..
KTH, School of Electrical Engineering and Computer Science (EECS), Computer Science, Computational Science and Technology (CST).
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2019 (English)In: Physics of Plasmas, ISSN 1070-664X, E-ISSN 1089-7674, Vol. 26, no 10, article id 102904Article in journal (Refereed) Published
Abstract [en]

Measurements from the Rosetta mission have shown a multitude of nonthermal electron distributions in the cometary environment, challenging the previously assumed plasma interaction mechanisms near a cometary nucleus. In this paper, we discuss electron trapping near a weakly outgassing comet from a fully kinetic (particle-in-cell) perspective. Using the electromagnetic fields derived from the simulation, we characterize the trajectories of trapped electrons in the potential well surrounding the cometary nucleus and identify the distinguishing features in their respective velocity and pitch angle distributions. Our analysis allows us to define a clear boundary in velocity phase space between the distributions of trapped and passing electrons. Published under license by AIP Publishing.

Place, publisher, year, edition, pages
AMER INST PHYSICS , 2019. Vol. 26, no 10, article id 102904
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Computational Mathematics
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URN: urn:nbn:se:kth:diva-266916DOI: 10.1063/1.5115456ISI: 000505980600044Scopus ID: 2-s2.0-85074294951OAI: oai:DiVA.org:kth-266916DiVA, id: diva2:1416159
Note

QC 20200322

Available from: 2020-03-22 Created: 2020-03-22 Last updated: 2020-03-22Bibliographically approved

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Sishtla, Chaitanya PrasadOlshevsky, ViacheslavMarkidis, Stefano

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