Computer Science
Scientific paper
Oct 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992ncimc..15..599b&link_type=abstract
Nuovo Cimento C, Serie 1 (ISSN 0390-5551), vol. 15 C, no. 5, p. 599-605.
Computer Science
1
Magnetohydrodynamic Waves, Solar Wind Velocity, Wave Propagation, Correlation, Statistical Analysis
Scientific paper
The radial evolution of Alfvenic correlation is such that its value decreases with increasing heliocentric distance. So far this behavior has been interpreted as an increase in the local production of 'inward' modes interacting destructively with the 'outward' modes. This work, which deals with large-scale turbulence, shows that local generation phenomena are not commonly found in the solar wind and that the Alfvenic character of the fluctuations mainly depend on the 'outward' modes alone. The interaction of these modes with density and/or magnetic-field structures convected by the wind causes their destruction and a consequent depletion of the Alfvenic correlation. The same effect would be obtained if 'inward' modes were really present. Our conclusions are that large-scale 'inward' modes are the spectral counterpart of non-propagating field and plasma structures convected by the solar wind and identified as both compression regions and pressure balance structures.
Bavassano Bruno
Bruno Roberto
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