Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990icar...83..126d&link_type=abstract
Icarus (ISSN 0019-1035), vol. 83, Jan. 1990, p. 126-132.
Astronomy and Astrophysics
Astrophysics
7
Fragmentation, Hypervelocity Impact, Mass Distribution, Projectile Cratering, Cosmic Dust, Free Fall, Time Dependence, Velocity Distribution, Dust, Production Rate, Fragmentation, Impacts, Hypervelocity, Evolution, Cratering, Laboratory Studies, Experiments, Timescale, Diagrams, Origin, Photographs, Distribution, Formation
Scientific paper
An analysis of very fast framing photographs of free-falling bodies that were disrupted catastrophically by hypervelocity impacts has revealed the presence of two processes: (1) cratering, which reaches completion only tens of microsec after impact; and (2) bulk fragmentation, whose duration is severalfold the time required for compressional waves to move from the source point to the target's farthest boundary. It is suggested that the two branches of the cumulative mass distribution are representative of the two different genetic processes of cratering and bulk fragmentation.
di Martino Mario
Martelli Gianpasquale
Smith P. N.
Woodward A. W.
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