Behavior of heavy ions in a collisionless parallel shock generated by the solar wind and planetary plasma interactions

Details Behavior of heavy ions in a collisionless parallel shock generated by the solar wind and planetary plasma interactions Behavior of heavy ions in a collisionless parallel shock generated by the solar wind and planetary plasma interactions

Dec 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996jgr...10127565s&link_type=abstract

Journal of Geophysical Research, Volume 101, Issue A12, p. 27565-27572

Physics

Plasma Physics

Interplanetary Physics: Pickup Ions, Interplanetary Physics: Planetary Bow Shocks, Space Plasma Physics: Numerical Simulation Studies, Space Plasma Physics: Wave/Particle Interactions

Scientific paper

The role of heavy ions in the collisionless parallel shock of Venus and Mars is investigated where the solar wind interacts directly with the planetary ionosphere. We consider O+ ions in the planetary plasma and He++ ions (α particles) in the solar wind as the heavy-ion species. By solving a linear dispersion relation of the ion cyclotron beam instability, which provides a dissipation in the parallel shock, we find that the dominant frequency and wavenumber are not much modified when the heavy ions are included in a realistic amount. Particle simulations are performed in order to examine the effects and dynamical behavior of the heavy ions in the parallel shock. The re-formation of the parallel shock is observed, which confirms that the electromagnetic waves that make up the parallel shock is not affected by the heavy ions. Notable pickup of O+ ions by electromagnetic waves is not detected. Instead, strong heating of the solar wind He++ ions is observed in the parallel shock region.

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