Physics
Scientific paper
Aug 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995sosyr..29..249m&link_type=abstract
Solar System Research, Vol. 29, No. 4, p. 249 - 260
Physics
Cometary Plasma: Bow Shocks, Cometary Plasma: Space Missions, Cometary Plasma: Instabilities
Scientific paper
The results of wave and plasma experiments from Vega-1, -2 and Giotto obtained during the flight of comet 1P/Halley in March 1986 are reviewed. The plasma boundaries W and M1 in the region between the bow shock and the cometopause (≅1.2×106 and ≅1.6×105km from the cometary nucleus, respectively) were identified with the data from Vega-1, -2, and the so-called mysterious region and mysterious transition were revealed on the basis of the Giotto observations. The question that is analyzed is whether these boundaries are typical for all active comets at distances of about 1 AU from the Sun, or whether they are a manifestation of temporary and nonstationary phenomena. Since no commonly accepted physical mechanisms of formation of these boundaries, and regions are known, the authors consider the variants of their interpretation to be associated with the development of plasma instabilities and the charge transfer of heavy cometary ions.
Maslenitsyn S. F.
Mikhajlov Yu. M.
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