The effect of a non-volatile dust mantle on the energy balance of cometary surface layers

Details The effect of a non-volatile dust mantle on the energy balance of cometary surface layers The effect of a non-volatile dust mantle on the energy balance of cometary surface layers

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992acm..proc..317k&link_type=abstract

In Lunar and Planetary Inst., Asteroids, Comets, Meteors 1991 p 317-320 (SEE N93-19113 06-90)

Physics

Comet Nuclei, Cometary Atmospheres, Comets, Cosmic Dust, Energy Budgets, Ice, Surface Layers, Surface Temperature, Debris, Irradiation, Porosity, Temperature Effects, Thickness

Scientific paper

It is likely that large parts of a cometary surface layer consist of porous ices, which are covered by a thin layer of non-volatile debris, whose structure is also fluffy and porous. In this paper the results of model calculations are presented. The calculations show the effect of ice and dust pore sizes and of the dust mantle thickness upon the thermal behavior of such a dust-ice system, when it is irradiated by the sun. In particular, it is found that the average pore size of the ice and the dust material has a large influence both on the dust surface temperature and on the temperature at the dust-ice interface.

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