Computer Science
Scientific paper
Jul 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994adspr..14r..31s&link_type=abstract
Advances in Space Research, Volume 14, Issue 7, p. 31-34.
Computer Science
1
Scientific paper
The previous results on the magnetosheath plasma investigation show that the magnetosheath ion population often consists of a shocked solar wind and a magnetospheric component with a higher energy. Both these components are usually considered as having a Maxwellian energy ion distribution function (DF), whereas measurements with sufficient temporal and angular resolution reveal a ``beam'' structure of DF in a large region downstream of the bow shock. In this contribution we present experimental data demonstrating such structure in the low-energy part (up to 20 keV) of the ion DF in that region. We suggest some processes likely to be responsible for the creation of a smooth magnetosheath DF from the narrow beams which originated in the shock. Our results give a high degree of correlation between these processes and the magnetic field fluctuations. We are led to the conclusion that either the low-frequenccy waves with high amplitudes are generated during the relaxation process or the assumption of frozen-in magnetic field does not hold with sufficient accuracy.
Nemecek Zdenek
Safrankova Jana
Santolik Ondrej
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