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Meteors and interplanetary dust

  • Peter M. Millman
4 Meteors and Their Relation to Interplanetary Dust
Part of the Lecture Notes in Physics book series (LNP, volume 48)

Abstract

The contribution of meteor observations to our knowledge of meteoroids and interplanetary dust is reviewed under four headings — flux, mass distribution, physical structure and chemical composition. For lower limits of particle mass ranging from 1 g to 10−5 g the mean cumulative flux into the earth's atmosphere varies from 2 × 10−15 to 6 × 10−9 particles m−2 s−1 (2πster)−1, and the mean size distribution of these particles is given by log N = C − 1.3 log M, where N is the cumulative number of particles counted down to a lower mass limit M, and C is a constant. The physical structure of meteoroids in the above range is essentially fragile, with generally low mean bulk densities that tend to increase with decrease in mass. A minor fraction, about 10 or 15 percent, with orbits lying inside that of Jupiter, have densities several times the average densities, approaching those of the carbonaceous chondrites. The mean chemical composition of meteoroids seems to be similar to the bronzite chondrites for the elements heavier than number 10, but with the probable addition of extra quantities of the light volatiles H, C and O.

Keywords

Government Printing Carbonaceous Chondrite Meteor Shower Interplanetary Dust Background Flux 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1976

Authors and Affiliations

  • Peter M. Millman
    • 1
  1. 1.Herzberg Institute of AstrophysicsNational Research Council of CanadaOttawaCanada

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