Abstract Based on the ion, electron and neutral gas observations, performed by five of the six sensors comprising the PLASMAG-1 experiment on board VEGA-1 and -2, the following results are discussed: (1) the existence of the bow shock and its location at ≀ 1.1×106 km for VEGA-1 inbound; (2) the existence of a cometopause and its location at ≀ 1.6×105 km for VEGA-2 inbound; (3) the plasma dynamical processes occurring inside the cometosheath; (4) the phenomena taking place within the cometary plasma region including mass-spectroscopy of cometary ions at distances ≀ 1.5×104 km; (5) the existence of keV electrons near closest approach to the nucleus; and (6) the radial dependence of the cometary neutral gas and the comparison with model calculations, yielding a mean ionization scale length of ≀ 2×106 km and an overall production rate of ≀ 1.3×1030 molecules s−1 for VEGA-1 inbound. The results are also discussed in the context of the other, both remote and in-situ, observations, performed on board the VEGA- and GIOTTO-spacecraft.


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    Titel :

    First results of plasma and neutral gas measurements from Vega - 1 2 near comet Halley


    Beteiligte:
    Gringauz, K.I. (Autor:in) / Remizov, A.P. (Autor:in) / Verigin, M.I. (Autor:in) / Denchikova, L.I. (Autor:in) / Dyachkov, A.V. (Autor:in) / Klimenko, I.N. (Autor:in) / Vladimirova, G.A. (Autor:in) / Somogyi, A.J. (Autor:in) / Szegö, K. (Autor:in) / Szendrö, S. (Autor:in)

    Erschienen in:

    Advances in Space Research ; 5 , 12 ; 165-174


    Erscheinungsdatum :

    1985-01-01


    Format / Umfang :

    10 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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