Plasma flow in the cometosheath of P/Halley during the encounter of Suisei

  • S. Takahashi
  • T. Terasawa
  • T. Mukai
  • M. Kitayama
  • W. Miyake
  • K. Hirao
Conference paper

Summary

We estimate proton and alpha particle bulk parameters within the cometosheath. We observed that the density of proton was almost constant (~ 200 cm-3) except near the bow shock and that of alpha particle was almost constant (~ 7 cm-3) in the cometosheath. Temperature of protons seems to decrease from bow shock to about 2 105 km, and increase thereafter slightly, but that of alpha particle seems to be almost constant. This decrease is likely caused by the cooling effect accompanying with the charge exchange process as well as with the mass addition of cold pickup ions. On the contrary, the observed temperature of alpha particles stayed almost constant throughout the cometosheath. This is because that there is no effective cooling process for alpha particles within the cometosheath.

Key words

Comet Cometosheath comet-solar wind interaction 

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References

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Copyright information

© Springer-Verlag Berlin Heidelberg 1988

Authors and Affiliations

  • S. Takahashi
    • 1
  • T. Terasawa
    • 1
  • T. Mukai
    • 2
  • M. Kitayama
    • 2
  • W. Miyake
    • 3
  • K. Hirao
    • 4
  1. 1.Geophysical InstituteKyoto UniversityKyoto 606Japan
  2. 2.Institute of Space and Astronautical ScienceMeguro, Tokyo 153Japan
  3. 3.Radio Research LaboratoriesNakaminato, IbaragiJapan
  4. 4.Faculty of EngineeringTokai UniversityHiratuka, KanagawaJapan

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