Ion dynamics and distribution around Comet Halley - Suisei observation

Details Ion dynamics and distribution around Comet Halley - Suisei observation Ion dynamics and distribution around Comet Halley - Suisei observation

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986georl..13..829m&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 13, Aug. 1986, p. 829-832.

Physics

33

Halley'S Comet, Ion Motion, Plasma Dynamics, Space Plasmas, Interplanetary Magnetic Fields, Ion Density (Concentration), Japanese Spacecraft, Lines Of Force, Magnetohydrodynamic Flow

Scientific paper

Ion dynamics inside the cometosheath of Halley is described based on the plasma observation by Suisei. The pickup shells of water-group ions and protons of cometary origin are clearly identified. Field line draping around the comet is observed within 2×105km of the Halley's nucleus, where magnetic field directions are derived from the symmetry axes of the ion-pickup shells. Flow turbulence is observed as short-term (period of ⪉2 min) fluctuations of the anisotropy direction in the outer cometosheath (2 - 4.5×105km from the nucleus), while the flow is found to be laminar near the closest approach (1.5 - 2×105km from the nucleus). Spatial distribution of density of water-group ions (identified up to 4×106km from the nucleus) is also presented.

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