Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996dps....28.0819a&link_type=abstract
American Astronomical Society, DPS meeting #28, #08.19; Bulletin of the American Astronomical Society, Vol. 28, p.1086
Astronomy and Astrophysics
Astronomy
Scientific paper
An important consideration for comet modeling is the dependence of the thermal conductivity on the comet structure. The microporosity of the comet ices changes with time as the phase of the ice and it's annealing history progresses. The comet model of Alexander and Gombosi models multi-component diffusion of gas within the nucleus using 3 volatiles; water, CO2, and CO, as well as a dust component. The model also accounts for the effect of the vapor phase on the nucleus thermal conductivity. The model can integrate through a limited series of discrete changes to the microstructure and corresponding changes to nucleus thermal conductivity. Effects of these changes on the overall gas production, as a function of time, will be presented.
Alexander Clark
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