Ejecta from impact craters

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Ejecta from impact craters

Postby David Entwistle » Wed Apr 18, 2012 7:52 pm

Not a new publication, but new to me. What looks to be a very interesting paper relating to impact events.

Ejecta from impact craters by Kevin R. Housena and Keith A. Holsapple.

Abstract

An important feature of impacts into Solar System bodies is the fate of crater ejecta, the near-surface material launched during the highly dynamic crater formation process. Laboratory measurements of impact crater ejecta from 18 studies are summarized. The data are examined and used to assess our understanding of how the ejecta velocity and mass distributions depend on the conditions of an impact event. The effects of impact speed on the ejecta are reasonably well understood, but the dependences on target properties such as strength and porosity are only poorly constrained. A point-source scaling model for the ejecta mass and velocity distributions is developed and fit to the data for several classes of materials distinguished by porosity.
David Entwistle
 
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