Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990dres.iafcq....s&link_type=abstract
IAF, International Astronautical Congress, 41st, Dresden, Federal Republic of Germany, Oct. 6-12, 1990. 11 p.
Astronomy and Astrophysics
Astronomy
Carbonaceous Chondrites, Cosmic Dust, Halley'S Comet, Mineralogy, Time Of Flight Spectrometers, Chemical Composition, Iron Oxides, Silicates
Scientific paper
This paper investigates some obvious features of the inorganic dust component of Comet Halley. It is based on spectra obtained by the time-of-flight mass spectrometer PUMA-1 on board VEGA-1 which passed Comet P/Halley March 1986. The interpretation of the spectra and an instrumental effect are explained. The chemical composition of the dust is comparable to CI-carbonaceous chondrites within a factor of two for most elements. Carbon and nitrogen are significantly enriched. The mineralogy is dominated by anhydrous Mg-silicates (Mg-rich pyroxen and olivine), Fe-sulfides and probably Fe-metal. Fe-oxides like magnetite cannot be excluded but seem to play only a small role. The question of an occurrence of hydrous silicates in the dust is not yet clear.
Schulze Henrik
Wasch Richard
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