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Identification of boundaries in the cometary environment from ac electric field measurements

  • M. Mogilevsky
  • Y. Mikhailov
  • O. Molchanov
  • R. Grard
  • A. Pedersen
  • J. G. Trotignon
  • C. Béghin
  • V. Formisano
  • V. Shapiro
  • V. Shevchenko
Conference paper

Summary

Electric fields are measured with the APV-V experiment in the frequency range 8 Hz-300 kHz. The field amplitude increases significantly, first at a distance of 2 105 km, then at distances of 1.2–1.5 105 km, and 5–7 104 km from the nucleus. These phenomena have been observed both on Vega-1 and Vega-2. The electric field measurements are compared with data obtained from dust and plasma experiments; possible mechanisms responsible for the existence of these boundaries are discussed.

Key words

comet Halley Vega electric field boundaries cometopause plasma 

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References

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Copyright information

© Springer-Verlag Berlin Heidelberg 1988

Authors and Affiliations

  • M. Mogilevsky
    • 1
  • Y. Mikhailov
    • 1
  • O. Molchanov
    • 1
  • R. Grard
    • 2
  • A. Pedersen
    • 2
  • J. G. Trotignon
    • 3
  • C. Béghin
    • 3
  • V. Formisano
    • 4
  • V. Shapiro
    • 5
  • V. Shevchenko
    • 5
  1. 1.IZMIRANTroitskUSSR
  2. 2.Space Science DepartmentESA/ESTECNoordwijkThe Netherlands
  3. 3.Laboratoire de Physique et de Chimie de l’EnvironnementCNRSOrléansFrance
  4. 4.Istituto Plasma SpazioCNRFrascatiItaly
  5. 5.Space Research InstituteMoscow, GSP-7USSR

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