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Evolution of large-scale magnetosonic structures to trains of solitary waves
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.
2011 (English)In: Journal of Geophysical Research, ISSN 0148-0227, E-ISSN 2156-2202, Vol. 116, A07209- p.Article in journal (Refereed) Published
Abstract [en]

Large-amplitude magnetic pulsations on ion inertial length scales are often observed in space plasmas, but their theoretical explanation is still controversial. We discuss a possible mechanism, different from ideas based on the classical plasma instabilities, for the generation of these pulsations. It is demonstrated that a competition between dispersion and wave steepening processes can lead to the transformation of a large-scale magnetosonic structure into trains of solitons. This kind of longitudinal filamentation is possible for both slow and fast magnetosonic perturbations. Results of numerical simulations are compared with Cluster spacecraft measurements and show that the steepening filamentation mechanism can explain the emergence of a certain class of solitary waves observed in space plasmas.

Place, publisher, year, edition, pages
2011. Vol. 116, A07209- p.
Keyword [en]
solar-wind turbulence, mirror instability, solitons, plasmas, magnetopause, mechanism, motion
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:uu:diva-156957DOI: 10.1029/2011JA016565ISI: 000292838000003OAI: oai:DiVA.org:uu-156957DiVA: diva2:435829
Available from: 2011-08-20 Created: 2011-08-11 Last updated: 2017-12-08Bibliographically approved

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