Viscous relaxation on comets

Details Viscous relaxation on comets Viscous relaxation on comets

Oct 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006icar..184..584c&link_type=abstract

Icarus, Volume 184, Issue 2, p. 584-588.

Physics

2

Scientific paper

Three Jupiter family comets have now been observed by spacecraft with the surprising result that these comets lack unambiguous impact craters. Large-scale topography generally appears to be softened on these comets, although sharp topography is preserved at small scales. We find that viscous relaxation of water ice may explain these observations, given reasonable assumptions about ice grain size and temperatures attained in the interiors. We suggest that both the shapes and the cratering records of Jupiter family comets may be substantially modified and no longer reflect cometary formation processes or collisional evolution in the Kuiper Belt.

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