The evolution of topography on a comet

Details The evolution of topography on a comet The evolution of topography on a comet

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987icar...72..128c&link_type=abstract

Icarus (ISSN 0019-1035), vol. 72, Oct. 1987, p. 128-134. NASA-supported research.

Astronomy and Astrophysics

Astronomy

14

Comet Nuclei, Thermal Mapping, Topography, Astronomical Models, Cometary Atmospheres, Energy Conservation, Radiative Heat Transfer, Sublimation, Comets, Topography, Evolution, Models, Thermal Effects, Energy, Parameters, Sublimation, Calculations, Diagrams

Scientific paper

The authors have developed a simple model of an infinite cylindrical trench on a comet. The energy balance equation has been modified to include physical processes which are relevant with topography present, and includes shadowing, radiative heating from the opposing walls, and the condensation energy of sublimed gas molecules striking the walls instead of escaping to space. The model is designed to indicate the general course of the evolution of topography on a comet, and is not intended as a complete model of a cometary nucleus. By running the model for trenches of different depths and at different solar distances, the authors draw conclusions about the evolution of topography through an orbit and the consequences this evolution has on the evolution of the nucleus as a whole over the course of several perihelion passages.

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