Physics
Scientific paper
Sep 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980icar...43..350l&link_type=abstract
Icarus, vol. 43, Sept. 1980, p. 350-372.
Physics
19
Interplanetary Dust, Lunar Craters, Particle Size Distribution, Physical Properties, Aluminum, Density (Mass/Volume), Distribution Functions, Histograms, Iron, Polystyrene, Silicates, Zodiacal Light, Interplanetary Dust, Grain Size, Distribution, Physical Properties, Size, Moon, Microcraters, Impacts, Diagrams, Samples, Lunar, Comparisons, Sampling, Extraterrestrial, Experiments, Zodiacal Light, Flux, Laboratory Studies
Scientific paper
The size distribution and physical properties of interplanetary dust grains as indicated by the analysis of lunar microcraters are reviewed. The problems involved in the determination of the size distribution of lunar microcraters are considered, and a cumulative microcrater size distribution is presented for five microcrater samples which indicates a greater number of small microcraters than previously derived. The ratio of crater depth to diameter is then discussed as a means of studying the physical properties and chemical compositions of the grains, and it is shown that for a sample of 284 craters, the ratio increases with decreasing crater diameter. The size distribution and depth/diameter ratio data is interpreted as indicating the presence of two distinct dust populations consisting of a large-grain component with density typical of silicates and a small-grain component with a density typical of iron, with a minor silicate contribution. Spatial measurements and collection experiments are noted to support the interpretation, which also does not suggest the presence of particles of density less than 1 g/cu cm.
Lamy Philippe L.
Le Sergeant D'Hendecourt L. B.
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