Computer Science
Scientific paper
Jan 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989stin...8915852o&link_type=abstract
Unknown
Computer Science
International Sun Earth Explorers, Solar Wind, Spacecraft Instruments, Heating, Helium Ions, Ionization, Iron, Neon, Oxygen Ions, Silicon, Temperature, Velocity
Scientific paper
The principal observations obtained by the Ion Composition Instrument (ICI) flown on the ISEE-3/ICE spacecraft, which was in the solar wind from September 1978 to the end of 1982, before being directed to the far magnetotail of the Earth are discussed. Almost continuous observations were made of the abundances of 3He++, 4He++, O6+, O7+, Ne, Si and Fe in various charge states, and of their bulk speeds and temperatures. The results show that there is a strong tendency in the collisionless solar wind for the ionic temperatures to be proportional to the masses. For heavier ions these temperatures exceed typical coronal electron temperatures. 4He++, especially in high speed streams, moves faster than H+, and travels at the same speed as heavier ions. The mechanism leading to this heating and rapid streaming is still not entirely clear.
Bochsler Peter
Coplan Michael A.
Geiss Johannes
Ogilvie Keith. W.
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