Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8137498 | Icarus | 2015 | 7 Pages |
Abstract
Comet 9P/Tempel 1 was imaged during two consecutive perihelion passages. According to Thomas et al. (Thomas, et al. [2013]. Icarus 222, 453-466) one scarp located at 40°S receded up to 50 m. I attempted to use this observation to constrain local material properties of the nucleus. For this purpose I simulated recession of a model scarp due to sub-dust sublimation of ice. I have found, that the observed recession of the scarp can be reproduced when the dust mantle has high porosity about 0.8 and low thermal conductivity about 10 mW mâ1 Kâ1, as found for artificial dust layers (Krause, M., Blum, J., Skorov, Yu.V., Trieloff, M. [2011]. Icarus 214, 286-296). Taking into account the temperature dependence of the sublimation coefficient of ice reduces the calculated recession rate of the scarp by about 40%.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Space and Planetary Science
Authors
Konrad J. Kossacki,