Reconsideration of crater size-frequency distribution on the moon: Effect of projectile population and secondary craters
被引:6
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作者:
Nagumo, K
论文数: 0引用数: 0
h-index: 0
机构:
Kobe Univ, Grad Sch Sci & Technol, Kobe, Hyogo 6578501, JapanKobe Univ, Grad Sch Sci & Technol, Kobe, Hyogo 6578501, Japan
Nagumo, K
[1
]
Nakamura, AM
论文数: 0引用数: 0
h-index: 0
机构:
Kobe Univ, Grad Sch Sci & Technol, Kobe, Hyogo 6578501, JapanKobe Univ, Grad Sch Sci & Technol, Kobe, Hyogo 6578501, Japan
Nakamura, AM
[1
]
机构:
[1] Kobe Univ, Grad Sch Sci & Technol, Kobe, Hyogo 6578501, Japan
来源:
NEAR-EARTH OBJECTS, IMPACT HAZARDS, AND THE MARS INTERNATIONAL PROGRAM
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2001年
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28卷
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08期
关键词:
D O I:
10.1016/S0273-1177(01)00488-4
中图分类号:
V [航空、航天];
学科分类号:
08 ;
0825 ;
摘要:
The crater size-frequency distribution curve for the lunar surface has a bending point near 4 km in diameter. It is suggested that the steepening in the smaller diameter range is caused by the effects of secondary craters and/or size-frequency distribution of the impactors. In order to extract the fraction of the primary craters created by Near Earth Objects, among the primary-secondary mixture of km-size craters, we have examined the crater shape statistics using Clementine images of the lunar surface. We found that the size-frequency distribution of the craters with ellipticity smaller than 1.2 can be considered primary craters generated by impactors from interplanetary space. (C) 2001 COSPAR. Published by Elsevier Science Ltd. All rights reserved.