Physics
Scientific paper
Dec 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.302..185e&link_type=abstract
In ESA, Physics and Mechanics of Cometary Materials p 185-190 (SEE N90-19989 12-90)
Physics
6
Comets, Convective Heat Transfer, Quantitative Analysis, Substrates, Surface Layers, Temperature Gradients, Amorphous Materials, Comet Nuclei, Crystallization, Ice, Mass Transfer
Scientific paper
A method for a quantitative estimation of thermal gradients and chemical differentiation in porous icy mixtures is presented. This method was applied to comet nuclei containing different volatile species with special attention given to subsurface layers. Heat conduction by the solid and heat and mass transport by the gas phase in the pore system are included. Based on recent laboratory studies, the influence of the crystallization of amorphous ice on the thermal behavior and the gas release is considered. First results are presented for comet P/Churyumov-Gerasimenko.
Espinasse Sylvie
Klinger Jurgen
Ritz Catherine
Schmidt Bernhard
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