Computer Science
Scientific paper
Feb 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985stin...8533844b&link_type=abstract
Unknown
Computer Science
Energy Spectra, Helical Flow, Interplanetary Magnetic Fields, Magnetic Field Configurations, Magnetic Flux, Solar Wind, Helios 1, Helios 2, Magnetohydrodynamic Stability, Magnetohydrodynamic Turbulence, Solar Orbits
Scientific paper
Results on the spectra of magnetic helicity and magnetic energy as a function of radial distance from the Sun obtained through HELIOS A and B data in the range 0.3 to 1 AU are presented. The time intervals were chosen within the trailing edge of two different streams observed by the two spacecraft at different heliocentric distances. These periods were homogeneously characterized by almost incompressible Magnetohydrodynamic MHD fluctuations. Results show a steepening of the magnetic helicity spectra similar to that of the magnetic energy spectra by increasing the radial distance from the Sun. The indexes of the magnetic helicity spectra are systematically higher than those of the magnetic energy spectra. The correlation lengths for magnetic helicity are also higher than those of magnetic energy. A radial evolution of these correlation lengths is found. Results indirectly confirm the inverse cascade hypothesis for magnetic helicity.
Bruno Roberto
Dobrowolny Marino
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