Re-evaluation of the chemistry of dust grains in the coma of Comet Halley

Details Re-evaluation of the chemistry of dust grains in the coma of Comet Halley Re-evaluation of the chemistry of dust grains in the coma of Comet Halley

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991natur.350..480m&link_type=abstract

Nature (ISSN 0028-0836), vol. 350, April 11, 1991, p. 480, 481.

Computer Science

11

Cosmic Dust, Cosmochemistry, Halley'S Comet, Interstellar Matter, Chemical Composition, Comet Nuclei, Magnesium, Mass Spectroscopy, Vega Project, Comets, Halley, Chemistry, Dust, Grains, Comae, Puma Instrument, Spectrometry, Pia Instrument, Vega Missions, Giotto Mission, Origin, Composition, Elements, Mass, Analysis, Comparisons, Magnesium, Silicon, Chon Particles

Scientific paper

The chemical composition of individual grains in the coma of Comet Halley are evaluated here as a function of their mass based on data from the PUMA 1 and 2 mass spectrometers on the Vega mission. It is found that the compositions of heavy and light grains are very different, with light grains being Mg-rich, whereas the mean Mg(+)/SI(+) ratio in heavy grains is similar to CI chrondritic. The marked difference in composition between light and heavy grains indicates that the origin of the two grain populations might be different.

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