Mathematics
Scientific paper
Apr 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990icar...84..403f&link_type=abstract
Icarus (ISSN 0019-1035), vol. 84, April 1990, p. 403-413.
Mathematics
29
Carbon Monoxide, Comet Nuclei, Ice, Chemical Composition, Computer Programs, Interplanetary Dust, Mathematical Models, Water Temperature, Comets, Comet Nuclei, Carbon Monoxide, Ice, Surface, Differentiation, Computer Methods, Water Ice, Dust, Models, Volatility, Porosity, Gases, Temperature, Flux, Parameters, Pressure, Permeability, Mantle, Distance
Scientific paper
A comet nucleus model whose composition is a homogeneous mixture of water ice, CO ice, and dust, in a Halley-type orbit, is presently used to investigate the role of unclathrated CO ice in the activity and near-surface differentiation of comet nuclei. Temperatures of water and CO ice surfaces, CO gas and water steam fluxes, and depths of CO ice, are presented as functions of orbital position. It is determined that CO ice should always exist within 3 m of the surface; CO gas production exceeds water steam production beyond 2.5 AU, with consequences for the planned in situ elemental analysis of nuclei.
Fanale Fraser P.
Salvail James R.
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