The composition of very fine dust in the dust shell of comet halley

The composition of very fine dust in the dust shell of comet halley

An analysis of the spectra from the PUMA dust-impact mass spectrometers onboard the Vega-1 and Vega-2 spacecraft shows that a large number of the observed, unidentified small-amplitude peaks are produced by impacts of very-low-mass (from 10^sup -17^ to 10^sup -20^ g) particles. The mass flux of very...

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Veröffentlicht in:Astronomy letters 2000-07, Vol.26 (7), p.473-483
Hauptverfasser: Evlanov, E N, Prilutskii, O F, Zubkov, B V, Voiskovskii, M I
Format: Artikel
Sprache:eng
Schlagworte:
Astronomy
Chemical composition
Comets
Dust
Spacecraft
Spectrometers
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Zusammenfassung:An analysis of the spectra from the PUMA dust-impact mass spectrometers onboard the Vega-1 and Vega-2 spacecraft shows that a large number of the observed, unidentified small-amplitude peaks are produced by impacts of very-low-mass (from 10^sup -17^ to 10^sup -20^ g) particles. The mass flux of very fine particles accounts for a few percent of the total dust mass flux from comet Halley. The elemental composition of the finest cometary particles is identical to the composition of large particles (10^sup -12^-10^sup -16^ g), in agreement with present views about the nucleus of comet Halley as an aggregate of interstellar dust.[PUBLICATION ABSTRACT]
ISSN:1063-7737
1562-6873
DOI:10.1134/1.20415