Evolution of depressions on Comet 67P/Churyumov-Gerasimenko: Role of ice metamorphism

被引：11
|
作者：
Kossacki, Konrad J.
Leliwa-Kopystynski, Jacek
Szutowicz, Slawomira
机构：
[1] Warsaw Univ, Inst Geophys, PL-02093 Warsaw, Poland
[2] Polish Acad Sci, Space Res Ctr, PL-01237 Warsaw, Poland
来源：
ICARUS | 2006年 / 184卷 / 01期
关键词：
comets composition; comets nucleus; ices;
D O I：
10.1016/j.icarus.2006.04.018
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
This work is intended to investigate the influence of temperature-dependent metamorphism of ice on the shape of small depressions in the surface of cometary nuclei. We are mainly interested in the role of initial cohesivity of a nucleus. For this purpose we simulate sublimation of ice from the facets of initially cylindrical depressions in ice of different initial structure. The simulations account for the diurnal and orbital chances of insolation and its dependence on the current shape of the depressions. Our model includes heat transport in the cometary material and metamorphism of ice. We present the results obtained for the nucleus of the Comet 67P/Churyumov-Gerasimenko, target of the ESA cornerstone mission Rosetta. (c) 2006 Elsevier Inc. All rights reserved.
引用
收藏
页码：221 / 238
页数：18
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