Modeling the surface and interior structure of comet nuclei using a multidisciplinary approach

Details Modeling the surface and interior structure of comet nuclei using a multidisciplinary approach Modeling the surface and interior structure of comet nuclei using a multidisciplinary approach

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991ruht.rept.....o&link_type=abstract

Final Technical Report, 1 May 1989 - 30 Sep. 1991 Rice Univ., Houston, TX. Dept. of Space Physics and Astronomy.

Physics

Space Physics

Aggregates, Comet Nuclei, Cosmic Dust, Frost, Radiation Effects, Solar Radiation, Surface Properties, Cooling, Heating, Interstellar Matter, Mass Ratios, Soils, Sublimation, Sun

Scientific paper

The goal was to investigate the structural properties of the surface of comet nucleus and how the surface should change with time under effect of solar radiation. The basic model that was adopted was that the nucleus is an aggregate of frosty particles loosely bound together, so that it is essentially a soil. The nucleus must mostly be composed of dust particles. The observed mass ratios of dust to gas in the coma is never much greater than unity, but this ratio is probably a much lower limit than that of the nucleus because it is vastly easier to remove the gaseous component by sublimation than by carrying off the dust. Therefore the described models assumed that the particles in the soil were frost covered grains of submicron basic size, closely resembling the interstellar grains. The surface properties of such a nucleus under the effects of heating and cooling as the nucleus approaches and recedes from the Sun generally characterized.

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