Modeling of the thermal behavior and of the chemical differentiation of cometary nuclei

Details Modeling of the thermal behavior and of the chemical differentiation of cometary nuclei Modeling of the thermal behavior and of the chemical differentiation of cometary nuclei

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991icar...92..350e&link_type=abstract

Icarus (ISSN 0019-1035), vol. 92, Aug. 1991, p. 350-365. Research supported by INSU.

Other

89

Astronomical Models, Comet Nuclei, Halley'S Comet, Heat Transfer, Mass Transfer, Temperature Profiles, Carbon Dioxide, Carbon Monoxide, Chemical Composition, Water

Scientific paper

The model of a comet nucleus presently developed in view of the low average-density values reported for Comet P/Halley encompasses heat conduction through the solid matrix and heat and mass transfer due to pore-system vapor-phase circulation. The basis for the model is the resolution of two symmetric-diffusion equations, one of which describes the transport of matter and the other the transport of heat, through the entire nucleus. Different nucleus compositions, with ice mixtures containing H2O and either CO2 or CO, are investigated; attention is given to the evolution of the nucleus stratigraphy and the production rates of CO, CO2, and H2O.

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