Early-stage ejecta velocity distribution for vertical hypervelocity impacts into sand

被引：35

作者：

Hermalyn, Brendan ^{[1
]}

Schultz, Peter H. ^{[1
]}

机构：

[1] Brown Univ, Dept Geol Sci, Providence, RI 02912 USA

来源：

ICARUS | 2010年 / 209卷 / 02期

关键词：

Impact processes; Cratering; Collisional physics; Geological processes; OBLIQUE IMPACTS; CRATER EJECTA; EMPLACEMENT; FLOW;

D O I：

10.1016/j.icarus.2010.05.025

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页码：866 / 870

页数：5

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