期刊
ICARUS
卷 209, 期 2, 页码 866-870出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.icarus.2010.05.025
关键词
Impact processes; Cratering; Collisional physics; Geological processes
资金
- NASA [NNX08AM45G]
- NASA [97716, NNX08AM45G] Funding Source: Federal RePORTER
The ejects dynamics during main-stage excavation flow in a cratering event have previously been well characterized, particularly for vertical impacts. In this experimental study, we present new results addressing the early-time, low-angle, high-speed component of the ejecta velocity distribution as a function of time for hypervelocity vertical impacts into sand. Although this regime represents a very small portion of total ejected mass in laboratory experiments, it comprises a greater percentage of growth for larger craters. (C) 2010 Elsevier Inc. All rights reserved.
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