Radial Evolution of Magnetic Field Fluctuations in an Interplanetary Coronal Mass Ejection Sheath

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http://hdl.handle.net/10138/329216

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Good , S W , Ala-Lahti , M , Palmerio , E , Kilpua , E K J & Osmane , A 2020 , ' Radial Evolution of Magnetic Field Fluctuations in an Interplanetary Coronal Mass Ejection Sheath ' , Astrophysical Journal , vol. 893 , no. 2 , 110 . https://doi.org/10.3847/1538-4357/ab7fa2

Title: Radial Evolution of Magnetic Field Fluctuations in an Interplanetary Coronal Mass Ejection Sheath
Author: Good, S. W.; Ala-Lahti, M.; Palmerio, E.; Kilpua, E. K. J.; Osmane, A.
Contributor organization: Particle Physics and Astrophysics
Space Physics Research Group
Department of Physics
Date: 2020-04
Language: eng
Number of pages: 10
Belongs to series: Astrophysical Journal
ISSN: 0004-637X
DOI: https://doi.org/10.3847/1538-4357/ab7fa2
URI: http://hdl.handle.net/10138/329216
Abstract: The sheaths of compressed solar wind that precede interplanetary coronal mass ejections (ICMEs) commonly display large-amplitude magnetic field fluctuations. As ICMEs propagate radially from the Sun, the properties of these fluctuations may evolve significantly. We have analyzed magnetic field fluctuations in an ICME sheath observed by MESSENGER at 0.47 au and subsequently by STEREO-B at 1.08 au while the spacecraft were close to radial alignment. Radial changes in fluctuation amplitude, compressibility, inertial-range spectral slope, permutation entropy, Jensen-Shannon complexity, and planar structuring are characterized. These changes are discussed in relation to the evolving turbulent properties of the upstream solar wind, the shock bounding the front of the sheath changing from a quasi-parallel to quasi-perpendicular geometry, and the development of complex structures in the sheath plasma.
Subject: Solar wind
Interplanetary magnetic fields
Interplanetary turbulence
SOLAR-WIND TURBULENCE
DRIVEN
WAVES
EARTH
115 Astronomy, Space science
Peer reviewed: Yes
Rights: unspecified
Usage restriction: openAccess
Self-archived version: acceptedVersion


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