NDLI: Spectral law and polarization properties of the low-frequency waves at the magnetopause

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Spectral law and polarization properties of the low-frequency waves at the magnetopause

Content Provider	Hyper Articles en Ligne (HAL)
Author	Rezeau, L. Belmont, G. Cornilleau-Wehrlin, N. Reberac, F. Briand, Cyril
Copyright Year	1999
Abstract	The magnetic fluctuations, at the magnetopause and in the adjacent magnetosheath, exhibit power law spectra which are very reminiscent of turbulent spectra. In prospect of future modelizations of such a turbulence, new information is brought about the experimental properties of these fluctuations. The power laws spectra previously obtained in the ULF range are shown to hold also in VLF, up to the lower hybrid frequency. Concerning the polarization, 1) the direction with respect to the static magnetic field is shown to be dominantly perpendicular at low frequencies, consistently with Shear Alfven modes in this range, and 2) no right-hand sense of rotation can be evidenced at frequencies higher than the proton gyrofrequency, although one could expect the fast magnetosonic mode to be dominant in this range. The physical implications of this last observation for the non linear effects at work in the turbulence are briefly discussed.
Related Links	https://hal.science/hal-00408119/file/1999GL900060.pdf
ISSN	00948276
e-ISSN	19448007
DOI	10.1029/1999GL900060
Journal	Geophysical Research Letters
Issue Number	6
Volume Number	26
Language	English
Publisher	HAL CCSD American Geophysical Union
Publisher Date	1999-03-01
Access Restriction	Open
Subject Keyword	Space Plasma Physics: Waves and instabilities and boundary layers Magnetospheric Physics: Solar wind magnetosphere interactions cusp Magnetospheric Physics: Magnetopause Space Plasma Physics: Turbulence Physics [physics] Plasma Physics [physics.plasm-ph] Sciences of the Universe [physics] Earth and Planetary Astrophysics [astro-ph.EP] Physics [physics] Astrophysics [astro-ph] Earth and Planetary Astrophysics [astro-ph.EP]
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Geophysics

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