The Fragmentation and Vaporization of Dust in Grain-Grain Collisions

Details The Fragmentation and Vaporization of Dust in Grain-Grain Collisions The Fragmentation and Vaporization of Dust in Grain-Grain Collisions

Nov 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...454..254b&link_type=abstract

Astrophysical Journal v.454, p.254

Astronomy and Astrophysics

Astronomy

32

Ism: Dust, Extinction

Scientific paper

We present a detailed analysis of the evolution of the size distribution of fast-moving interstellar dust particles decelerating in a dusty plasma. The physical processes considered in this paper include sputtering by gas-grain collisions, and partial and complete evaporation, fragmentation, and cratering by grain-grain collisions. We find that the final distribution of grains, initially characterized by a power-law distribution in grain sizes, exhibits an excess of small-to-large particles, compared to the initial distribution. This excess depends on the initial grain velocity and should be detectable by infrared observations of low- and intermediate-velocity clouds with the Infrared Space Observatory scheduled for launch around 1996.

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