The Composition of Very Fine Dust in the Dust Shell of Comet Halley

Details 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

Aug 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000astl...26..473e&link_type=abstract

Astronomy Letters, vol. 26, p. 473-483 (2000)

Astronomy and Astrophysics

Astronomy

1

Scientific paper

An analysis of the spectra from the PUMA dust-impact mass spectrometers onboard the VEGA-1 and VEGA-2 spacecrafts shows that a large number of the observed, unidentified small-amplitude peaks are produced by impacts of very-low-mass (from 10^{-17} to 10^{-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^{-12}-10^{-16} g), in agreement with present views about the nucleus of comet Halley as an aggregate of interstellar dust.

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