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Abstract

The low-frequency plasma wave detector (APV-N) carried by the Vega 1 and Vega 2 spacecraft during their encounter with comet Halley registered an enhanced plasma-wave intensity identified with the inbound crossing of a quasi-perpendicular (Vega 1) or quasi-parallel (Vega 2) cometary bow shock. We also describe the characteristics of the plasma waves excited in the process of anomalously fast ionization of the cometary atmosphere in the inner coma.

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Author information

Affiliations

  1. Space Research Institute, Profsoyuznaya 84/32, 117810 Moscow GSP-7, USSR

    • S. Klimov
    • , S. Savin
    • , G. Avanesova
    • , V. Balebanov
    • , M. Balikhin
    • , A. Galeev
    • , B. Gribov
    • , M. Nozdrachev
    • , V. Smirnov
    • , A. Sokolov
    •  & O. Vaisberg
  2. Institute of Physics and Mechanics, 290601 Lvov, USSR

    • Ya. Aleksevich
    •  & J. Juchniewicz
  3. Centre for Space Research, 01237 Warsaw, Poland

    • P. Oberc
    • , S. Grzedzielski
    • , K. Nowak
    • , D. Orlowski
    •  & D. Woźniak
  4. Aviation Institute, 02256 Warsaw, Poland

    • Z. Krawczyk
    • , B. Parfianovich
    •  & Z. Zbyszynski
  5. Geophysical Institute, 14131 Prague, Czechoslovakia

    • Ya. Voita
    •  & P. Triska

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https://doi.org/10.1038/321292a0

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