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| Titel |
Multi-spacecraft measurement of anisotropic power levels and scaling in solar wind turbulence |
| VerfasserIn |
K. T. Osman, T. S. Horbury |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 27, no. 8 ; Nr. 27, no. 8 (2009-08-04), S.3019-3025 |
| Datensatznummer |
250016609
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| Publikation (Nr.) |
 copernicus.org/angeo-27-3019-2009.pdf |
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| Zusammenfassung |
| Measurements by the four Cluster spacecraft in the solar wind are used to
determine quantitatively the field-aligned anisotropy of magnetohydrodynamic
inertial range turbulence power levels and spectral indexes. We find, using
time-lagged second order structure functions, that the spectral index is near
2 around the field-parallel direction, which is consistent with a "critical
balance" turbulent cascade. Solar wind fluctuations are found to be
anisotropic with power mainly in wavevectors perpendicular to the mean field,
where the spectral index is around 5/3. |
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