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dc.contributor.author
Weygand, James M.
dc.contributor.author
Matthaeus, W. H.
dc.contributor.author
Dasso, Sergio Ricardo
dc.contributor.author
Kivelson, M.G.
dc.contributor.author
Kistler, L. M.
dc.contributor.author
Mouikis, C.
dc.date.available
2017-07-17T16:27:46Z
dc.date.issued
2009-12
dc.identifier.citation
Weygand, James M.; Matthaeus, W. H.; Dasso, Sergio Ricardo; Kivelson, M.G.; Kistler, L. M.; et al.; Anisotropy of the Taylor Scale and the Correlation Scale in Plasma Sheet and Solar Wind Magnetic Field Fluctuations; American Geophysical Union; Journal of Geophysical Research; 114; A7; 12-2009; A07213,1-15
dc.identifier.issn
0148-0227
dc.identifier.uri
http://hdl.handle.net/11336/20689
dc.description.abstract
Magnetic field data from nine spacecraft in the magnetospheric plasma sheet and the solar wind are employed to determine the correlation scale and the magnetic Taylor microscale from simultaneous multiple-point measurements for multiple intervals with a range of mean magnetic field directions. We have determined that in the solar wind the Taylor scale is independent of direction relative to the mean magnetic field, but the correlation scale along the mean magnetic field (2.7 106 ± 0.2 106 km) is longer than along the perpendicular direction (1.5 106 ± 0.1 106 km). Within the plasma sheet we found that the correlation scale varies from 16,400 ± 1000 km along the mean magnetic field direction to 9200 ± 600 km in the perpendicular direction. The Taylor scale is also longer parallel to the magnetic field (2900 ± 100 km) than perpendicular to it (1100 ± 100 km). In the solar wind the ratio of the parallel correlation scale to the perpendicular correlation scale is 2.62 ± 0.79; in the plasma sheet the ratio is 1.78 ± 0.16, which indicates that the turbulence in both regions is anisotropic. The correlation and Taylor scales may be used to estimate effective magnetic Reynolds numbers separately for each angular channel. Reynolds numbers were found to be approximately independent of the angle relative to the mean magnetic field. These results may be useful in magnetohydrodynamic modeling of the solar wind and the magnetosphere and can
contribute to our understanding of solar and galactic cosmic ray diffusion in the
heliosphere.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Geophysical Union
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Solar Wind
dc.subject
Turbulence
dc.subject
Magnetohydrodynamics
dc.subject.classification
Astronomía
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Ciencias Físicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Anisotropy of the Taylor Scale and the Correlation Scale in Plasma Sheet and Solar Wind Magnetic Field Fluctuations
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-07-17T13:33:28Z
dc.journal.volume
114
dc.journal.number
A7
dc.journal.pagination
A07213,1-15
dc.journal.pais
Estados Unidos
dc.journal.ciudad
Nueva York
dc.description.fil
Fil: Weygand, James M.. University of California; Estados Unidos
dc.description.fil
Fil: Matthaeus, W. H.. University of Delaware; Estados Unidos
dc.description.fil
Fil: Dasso, Sergio Ricardo. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
dc.description.fil
Fil: Kivelson, M.G.. University of California; Estados Unidos
dc.description.fil
Fil: Kistler, L. M.. University of New Hampshire; Estados Unidos
dc.description.fil
Fil: Mouikis, C.. University of New Hampshire; Estados Unidos
dc.journal.title
Journal of Geophysical Research
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1029/2008JA013766
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1029/2008JA013766/abstract
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