Impact cratering and break up of the small bodies of the Solar System

被引：23

作者：

Leliwa-Kopystynski, J. ^{[2
,3
]}

Burchell, M. J. ^{[1
]}

Lowen, D. ^{[1
]}

机构：

[1] Univ Kent, Ctr Astrophys & Planetary Sci, Canterbury CT2 7NH, Kent, England

[2] Warsaw Univ, Inst Geophys, PL-02093 Warsaw, Poland

[3] Polish Acad Sci, Space Res Ctr, PL-00716 Warsaw, Poland

来源：

ICARUS | 2008年 / 195卷 / 02期

基金：

英国科学技术设施理事会;

关键词：

asteroids; collisional physics; impact processes; surfaces; satellites;

D O I：

10.1016/j.icarus.2008.02.010

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We consider the largest impact craters observed on small satellites and asteroids and the impact disruption of such bodies. Observational data are considered from 21 impact-like structures on 13 satellites and 8 asteroids (target body radii in the range 0.7-265 km). If the radius of the target body is R and the diameter of the largest crater observed on this body D, the ratio D/R is then the main observational parameter of interest. This is found on the observed bodies and compared to data obtained in the laboratory. Taking the largest observed value for D/R as a proxy for the ratio D-C/R (where D-C is the diameter of the largest crater that can be formed on a body without shattering it) it was found that for the observed icy satellites D-C,D-icy approximate to 1.2R and for the asteroids and the rocky satellites D-C,D-rocky approximate to 1.6R. In laboratory experiments with ice targets at impactor speeds of 1 to 3 km s(-1) we obtained D-C,D-icy approximate to 1.64R. (C) 2008 Elsevier Inc. All rights reserved.

引用

页码：817 / 826

页数：10

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