Evolution of topography on comets. II - Icy craters and trenches

Details Evolution of topography on comets. II - Icy craters and trenches Evolution of topography on comets. II - Icy craters and trenches

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990icar...85..205c&link_type=abstract

Icarus (ISSN 0019-1035), vol. 85, May 1990, p. 205-215. Research supported by NASA.

Other

24

Comets, Planetary Geology, Topography, Albedo, Craters, Methane, Solar Heating, Thermal Radiation, Three Dimensional Models, Comets, Topography, Evolution, Craters, Models, Heating, Sublimation, Ice, Icy Bodies, Energy, Grooves, Shadow, Thermal Effects, Trapping, Reflection, Shape, Distance, Albedo, Parameters, Water Ice, Methane, Geometry, Condensation, Jets, Calculations, Volatiles

Scientific paper

The determination of the effects of topography on the sublimation rates of comets and other icy bodies is presently approached via a model of ice heating and sublimation from topographical features. The energy balance equation is solved for cylindrical trenches and spherical craters; the model encompasses shadowing, solar heating, the trapping of thermal radiation and sublimed gas molecules, and reflection of sunlight within the cavity. Generally, an enhancement is found in the net sublimation rate for trenches and craters farther from the sun than some critical distance which depends on the albedo.

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