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| Titel |
Non-elliptic wavevector anisotropy for magnetohydrodynamic turbulence |
| VerfasserIn |
Y. Narita |
| 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 ; 33, no. 11 ; Nr. 33, no. 11 (2015-11-13), S.1413-1419 |
| Datensatznummer |
250121269
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| Publikation (Nr.) |
 copernicus.org/angeo-33-1413-2015.pdf |
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| Zusammenfassung |
A model of non-elliptic wavevector anisotropy is developed
for the inertial-range spectrum of magnetohydrodynamic turbulence and
is presented in the two-dimensional wavevector domain
spanning the directions parallel and perpendicular to the mean magnetic field.
The non-elliptic model is a variation of
the elliptic model with different scalings
along the parallel and the perpendicular components
of the wavevectors to the mean magnetic field.
The non-elliptic anisotropy model reproduces
the smooth transition of the power-law spectra
from an index of −2 in the parallel projection
with respect to the mean magnetic field
to an index of −5/3 in the perpendicular projection
observed in solar wind turbulence,
and is as competitive as the critical balance model
to explain the measured frequency spectra in the solar wind.
The parameters in the non-elliptic spectrum model
are compared
with the solar wind observations. |
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