Craters without ejecta

被引：31

作者：

Housen, Kevin R. ^{[1
]}

Holsapple, Keith A. ^{[2
,3
]}

机构：

[1] Boeing Co, Phys Sci, Seattle, WA 98124 USA

[2] Planetary Sci Inst, Tucson, AZ 85719 USA

[3] Univ Washington, Seattle, WA 98195 USA

来源：

ICARUS | 2012年 / 219卷 / 01期

关键词：

Collisional physics; Cratering; Impact processes; Regoliths; SOLAR-SYSTEM; 596; SCHEILA; MATHILDE; IMPACT; ASTEROIDS; HERMIONE; DENSITY; BODIES;

D O I：

10.1016/j.icarus.2012.02.030

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A significant portion of the Solar System's population of minor bodies may be quite porous. A unique aspect of crater formation in porous bodies is that large craters may form without the ejecta deposits that are associated with craters on less porous bodies. In this paper, laboratory experiments and scaling theories are used to identify the conditions under which ejecta deposits are suppressed. The results are consistent with the interpretation that large craters on asteroid Mathilde (porosity similar to 50%) and Saturn's moon Hyperion (porosity >40%) apparently formed without producing significant ejecta deposits, while smaller bodies do have notable regoliths. (c) 2012 Published by Elsevier Inc.

引用

页码：297 / 306

页数：10

共 22 条

[1] Astrometric masses of 21 asteroids, and an integrated asteroid ephemeris [J].

Baer, James ;

Chesley, Steven R. .

CELESTIAL MECHANICS & DYNAMICAL ASTRONOMY, 2008, 100 (01) :27-42

[2]

Britt D.T., 2002, Asteroids III, P485

[3]

Burchell M., 2009, LUNAR PLANET SCI, V40

[4] Cratering on Mathilde [J].

Chapman, CR ;

Merline, WJ ;

Thomas, P .

ICARUS, 1999, 140 (01) :28-33

[5] The significance of meteorite density and porosity [J].

Consolmagno, G. J. ;

Britt, D. T. ;

Macke, R. J. .

CHEMIE DER ERDE-GEOCHEMISTRY, 2008, 68 (01) :1-29

[6] New insights on the binary Asteroid 121 Hermione [J].

Descamps, P. ;

Marchis, F. ;

Durech, J. ;

Emery, J. ;

Harris, A. W. ;

Kaasalainen, M. ;

Berthier, J. ;

Teng-Chuen-Yu, J. -P. ;

Peyrot, A. ;

Hutton, L. ;

Greene, J. ;

Pollock, J. ;

Assafin, M. ;

Vieira-Martinsi, R. ;

Camargo, J. I. B. ;

Braga-Ribas, F. ;

Vachier, F. ;

Reichart, D. E. ;

Ivarsen, K. M. ;

Crain, J. A. ;

Nysewander, M. C. ;

Lacluyze, A. P. ;

Haislip, J. B. ;

Behrend, R. ;

Colas, F. ;

Lecacheux, J. ;

Bernasconi, L. ;

Roy, R. ;

Baudouin, P. ;

Brunetto, L. ;

Sposetti, S. ;

Manzini, F. .

ICARUS, 2009, 203 (01) :88-101

[7]

Holsapple K.A., 2007, DEEP IMPACT COMET TE, P586

[8] POINT-SOURCE SOLUTIONS AND COUPLING PARAMETERS IN CRATERING MECHANICS [J].

HOLSAPPLE, KA ;

SCHMIDT, RM .

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH AND PLANETS, 1987, 92 (B7) :6350-6376

[9] CATASTROPHIC DISRUPTIONS AND CRATERING OF SOLAR-SYSTEM BODIES - A REVIEW AND NEW RESULTS [J].

HOLSAPPLE, KA .

PLANETARY AND SPACE SCIENCE, 1994, 42 (12) :1067-1078

[10] Ejecta from impact craters [J].

Housen, Kevin R. ;

Holsapple, Keith A. .

ICARUS, 2011, 211 (01) :856-875

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