Physics
Scientific paper
Nov 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004jgra..10911105k&link_type=abstract
Journal of Geophysical Research, Volume 109, Issue A11, CiteID A11105
Physics
25
Interplanetary Physics: Mhd Waves And Turbulence, Interplanetary Physics: Solar Wind Plasma, Interplanetary Physics: Plasma Waves And Turbulence
Scientific paper
It is shown that the framework of Hall magnetohydrodynamics (Hall-MHD), which can support three quadratic invariants and allows nonlinear states to depart fundamentally from the Alfvénic, is capable of reproducing in the inertial range the three branches of the observed solar wind magnetic fluctuation spectrum: the Kolmogorov branch f-5/3, steepening to f-α1, with α1 $\simeq$ 3-4 on the high-frequency side and flattening to f-1 on the low-frequency side. These fluctuations are found to be associated with the nonlinear Hall-MHD shear Alfvén waves. The spectrum of the concomitant whistler-type fluctuations is very different from the observed one. Perhaps the relatively stronger damping of the whistler fluctuations may cause their unobservability. The issue of the anisotropy of the turbulence is addressed briefly.
Krishan Vinod
Mahajan Swadesh M.
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