Temperature evolution of porous ice samples covered by a dust mantle

Details Temperature evolution of porous ice samples covered by a dust mantle Temperature evolution of porous ice samples covered by a dust mantle

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992icar...96..204k&link_type=abstract

Icarus (ISSN 0019-1035), vol. 96, no. 2, April 1992, p. 204-212.

Physics

17

Comet Nuclei, Dust, Halley'S Comet, Temperature Distribution, Surface Temperature, Temperature Dependence

Scientific paper

A systematic study is conducted to illuminate the evolution of such dust-ice systems as the Comet Halley nucleus when they are irradiated by the sun. Both the surface temperature of the dust mantle and the temperature at the dust-ice interface are strong functions of the average pore radius of the materials and the mantle thermal conductivity. In the case of a micronic grain size insulating dust mantle, ice temperatures up to the triple point of water ice may be reached with one solar constant irradiation; in that of a highly insulating dust mantle, the ice temperature invariably remains below 200 K.

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