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Gringauz, K.I.; Verigin, M.I.; Remizov, A.P.; Oraevskij, A.A.; Szegoe, K.; Varga, A.
Hungarian Academy of Sciences, Budapest (Hungary). Central Research Inst. for Physics1989
Hungarian Academy of Sciences, Budapest (Hungary). Central Research Inst. for Physics1989
AbstractAbstract
[en] The in-situ measurements of secondary electrons and sputtered ions caused by impacts of neutral particles on metallic surfaces of the Ram Faraday Cup and Plasma Impact Detector sensors in PLAZMAG-1 instrument aboard VEGA 1,2 spacecraft are used to estimate neutral particle density distribution (nn) around comet P/Halley up to distances of approximately 3x10σ km. Asymmetries in nn distributions along inbound and outbound legs of spacecraft trajectory are attributed to solar radiation pressure. A model calculation, taking into account solar radiation pressure, leads to 'tear drop' shaped distribution of neutral particles around the cometary nucleus. (author) 46 refs.; 11 figs
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Apr 1989; 46 p
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