Kinetic Properties of Heavy Ions in the Solar Wind From SWICS/Ulysses

Details Kinetic Properties of Heavy Ions in the Solar Wind From SWICS/Ulysses Kinetic Properties of Heavy Ions in the Solar Wind From SWICS/Ulysses

Apr 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995ssrv...72...71v&link_type=abstract

Space Science Reviews, Volume 72, Issue 1-2, pp. 71-76

Physics

67

Solar Wind, Heavy Ions, Ulysses

Scientific paper

The kinetic properties of heavy ions in the solar wind are known to behave in a well organized way under most solar wind flow conditions: Their speeds are all equal and faster than that of hydrogen by about the local Alfvén speed, and their kinetic temperatures are proportional to their mass. The simplicity of these properties points to a straightforward physical interpretation; wave-particle interactions with Alfvén waves are the probable cause. With the SWICS sensor on board Ulysses, it is now possible to investigate the kinetic properties of many more ion species than before. Furthermore, the transition of Ulysses into the fast stream emanating from the south polar coronal hole since 1992 allows us to study these properties both in the slow, interstream solar wind, as well as in an unambiguously identified fast stream. We present data from SWICS/Ulysses on the dominant ions of He, C, O, Ne, and Mg. As a result we find that, both in the slow wind and in fast streams, the isotachic property is obeyed even better than it could be determined by the ICI instrument on ISEE-3. The mass proportionality ofT kin is also shown to hold for these ions, including the newly identified C and Mg.

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