Computer Science
Scientific paper
Jul 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aipc..382..347f&link_type=abstract
Proceedings of the eigth international solar wind conference: Solar wind eight. AIP Conference Proceedings, Volume 382, pp. 347
Computer Science
1
Interplanetary Magnetic Fields
Scientific paper
Power spectra of magnetic field variations show different behavior in two frequency regions; a high frequency region (f-5/3) and a low frequency region (f-1). A clue to the relationship between them is in the behavior of the breakpoint between the spectral regions. Statistical studies of the average behavior of spectra between 0.3 AU and 22 AU have shown that the breakpoint occurs at lower frequencies with larger heliocentric distances. Ideally the behavior of the breakpoint in a particular parcel of solar wind should be studied as that parcel propagates to larger heliocentric distances. The possibility of carrying out such a study is provided by the fact that in 1974 IMP 8 (1.0 AU), Pioneer 10 (4.3 AU) and Pioneer 11 (5.6 AU) were close to being coaligned. We compare the breakpoint observed at Earth with that observed at Pioneers 10 and 11 for closely matched samples of the wind and find good agreement with a model in which the high frequency spectrum develops in interplanetary space through a cascade from the low frequency spectrum.
Feynman Joan
Ruzmaikin Aleksandr
Smith Edward. J.
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