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Propagation of small size magnetic holes in the magnetospheric plasma sheet
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2016 (English)In: Journal of Geophysical Research - Space Physics, ISSN 2169-9380, E-ISSN 2169-9402, Vol. 121, no 6, 5510-5519 p.Article in journal (Refereed) Published
Abstract [en]

Magnetic holes (MHs), characteristic structures where the magnetic field magnitude decreases significantly, have been frequently observed in space plasmas. Particularly, small size magnetic holes (SSMHs) which the scale is less than or close to the proton gyroradius are recently detected in the magnetospheric plasma sheet. In this study of Cluster observations, by the timing method, the minimum directional difference (MDD) method, and the spatiotemporal difference (STD) method, we obtain the propagation velocity of SSMHs in the plasma flow frame. Furthermore, based on electron magnetohydrodynamics (EMHD) theory we calculate the velocity, width, and depth of the electron solitary wave and compare it to SSMH observations. The result shows a good accord between the theory and the observation.

Place, publisher, year, edition, pages
Wiley-Blackwell, 2016. Vol. 121, no 6, 5510-5519 p.
Keyword [en]
magnetic holes, plasma sheet, propagation velocity, electron magnetohydrodynamics, KdV soliton, small size
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:umu:diva-126763DOI: 10.1002/2016JA022741ISI: 000383421100037OAI: oai:DiVA.org:umu-126763DiVA: diva2:1037779
Available from: 2016-10-18 Created: 2016-10-13 Last updated: 2016-10-18Bibliographically approved

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Hamrin, MariaPitkänen, TimoDe Spiegeleer, Alexandre
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Department of Physics
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ReferencesLink to record
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