Ion Dynamics and Distribution Around Comet Halley: Suisei Observation
- Thomas J. Birmingham and
- Alexander J. Dessler
Published Online: 19 MAR 2013
Copyright 1988 by the American Geophysical Union.
How to Cite
Mukai, T., Miyake, W., Terasawa, T., Kitayama, M. and Hirao, K. (1988) Ion Dynamics and Distribution Around Comet Halley: Suisei Observation, in Comet Encounters (eds T. J. Birmingham and A. J. Dessler), American Geophysical Union, Washington, D.C.. doi: 10.1029/SP027p0052
- Published Online: 19 MAR 2013
- Published Print: 1 JAN 1988
Print ISBN: 9780875902395
Online ISBN: 9781118668757
- Cometocentric solar ecliptic (CSE) coordinate system;
- Ion dynamics;
- Plasma flow;
- Water-group ions
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 2×105 km 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 (2–4.5×105 km from the nucleus), while the flow is found to be laminar near the closest approach (1.5–2×105 km from the nucleus). Spatial distribution of density of water-group ions (identified up to 4×106 km from the nucleus) is also presented.