Computer Science – Sound
Scientific paper
Nov 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....9010779b&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 90, Nov. 1, 1985, p. 10,779-10,789. SNSF-supported research.
Computer Science
Sound
33
Heavy Ions, Ion Temperature, Satellite Sounding, Solar Wind, Autocorrelation, Helium Ions, International Sun Earth Explorer 3, Oxygen Ions, Positive Ions
Scientific paper
From a refined analysis of four years of data of the ion composition instrument on board ISEE 3, it is found that in the overwhelming majority of observations kinetic temperatures of ions are approximately proportional to their masses. The logarithmic average for T(He-4(2+) is 5.363; for T(O(6+)) and T(O(7+)) it is 5.978 and 6.000, respectively, corresponding to T(O)/T(He) = 4.2. For log T(Fe) 6.52 is found, corresponding to T(Fe)/T(He) = 14. The correlation coefficients between oxygen and helium kinetic temperatures are high (about 0.78 or above), whereas for the correlation log T(Fe) versus lag T(He) a value of only 0.44 is found due to the large measurement uncertainties of T(Fe). Significant deviations from the mass/temperature proportionality are found at occasions of cool and dense solar wind flow when Coulomb collisions succeed to equilibrate kinetic temperatures of different ion species.
Bochsler Peter
Geis Jason
Joos R.
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