Illuminating the bombardment history of the outer solar system

Details Illuminating the bombardment history of the outer solar system Illuminating the bombardment history of the outer solar system

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf.1560r&link_type=abstract

EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.1560

Physics

Scientific paper

We use crater counts assembled from high resolution Cassini ISS imagery of three saturnian satellites, Phoebe ( 220 km diameter), Hyperion ( 270 km diameter) andMimas (396 km diameter) as inputs into a sophisticated cratered terrain evolution model. Using appropriate scaling relationships, we determine the size frequency distribution (SFD) of small impactors in the saturnian system. We show through dynamical models that this population is dominated by objects originating in the Kuiper belt, and that the flux of main belt asteroids is negligible. We also show that while our derived saturnian system impactor population SFD has many characteristics in common with the main belt SFD, it is distinctly different.

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