Interaction processes of cometary plasma with the solar wind plasma in regions remote from the nucleus of the Comets Halley and Giacobini-Zinner

Details Interaction processes of cometary plasma with the solar wind plasma in regions remote from the nucleus of the Comets Halley and Giacobini-Zinner Interaction processes of cometary plasma with the solar wind plasma in regions remote from the nucleus of the Comets Halley and Giacobini-Zinner

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.250a.117o&link_type=abstract

In ESA Proceedings of the 20th ESLAB Symposium on the Exploration of Halley's Comet. Volume 1: Plasma and Gas p 117-127 (SEE N87

Computer Science

1

Giacobini-Zinner Comet, Halley'S Comet, Plasma Turbulence, Plasma-Particle Interactions, Solar Wind, Space Plasmas, Internal Friction, International Sun Earth Explorer 3, Interplanetary Magnetic Fields, Japanese Spacecraft, Plasma Waves

Scientific paper

Observations made by using energetic particles, plasma waves, and the magnetic field detectors onboard Sakigake, Suisei, and ICE spacecraft reveal widely distributed plasma turbulences in the region remote from nucleus of comets Halley and Giacobini-Zinner. The turbulences contain the ion cyclotron mode, lower hybrid mode, electron cyclotron mode, whistler mode, quasi-whistler mode, and electron acoustic mode waves. The turbulences are directly associated with the ion pick-up phenomena, as verified by the observations of the particle behavior. The turbulent regions show remarkable asymmetry of the distribution; the region is expanded by 2 or 3 times larger in the side of the postencounter compared with the side of the pre-encounter, in the range from 7 to 10 million km. The expansion of asymmetry of the plasma region is interpreted in terms of the friction of the cometary plasma with the solar wind plasma. It is suggested that the concept of ion pick-up should be changed from the simple gyro-motion model to the turbulent friction model.

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