Fragment jets from catastrophic break-up events and the formation of asteroid binaries and families

Details Fragment jets from catastrophic break-up events and the formation of asteroid binaries and families Fragment jets from catastrophic break-up events and the formation of asteroid binaries and families

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...271..315m&link_type=abstract

Astronomy and Astrophysics, Vol. 271, p. 315 (1993)

Astronomy and Astrophysics

Astrophysics

25

Asteroids, Collisions, Experiments

Scientific paper

A series of catastrophic break-up experiments were carried out in the open, against targets of natural and artificial rock, with and without a harder core. These experiments were aimed at investigating the outcomes of hypervelocity impact disruption phenomena, designed to understand the influence of large-scale collisions on the evolution of asteroids and other small solar system bodies. For the first time in this kind of experiments, evidence was found of strongly anisotropic ejection of fragments, including statistically significant `jets", closely aligned about some planes and directions. The presence of some groups of fragments lying on the ground at small mutual distances (some centimetres) and with many of their contours matching each other well was also detected. If similar phenomena occur after asteroidal catastrophic collisions, they could give rise to peculiar bodies such as "rubble pile" asteroids, gravitationally bound small fragments similar to the recently discovered binary asteroid 4769 Castalia, and asteroid families with complex non-isotropic morphologies.

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