Capture of cometary dust grains in impacts at 6.1 km s-1

Burchell, Mark J. and Foster, N. and Kearsley, A. and Wozniakiewicz, Penelope J. (2009) Capture of cometary dust grains in impacts at 6.1 km s-1. In: AIP Conference Proceedings. American IOP Institute of Physics pp. 898-901. ISBN 978-0-7354-0732-9. (doi:https://doi.org/10.1063/1.3295289) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Official URL
http://dx.doi.org/10.1063/1.3295289

Abstract

The NASA Stardust mission to comet 81P/Wild 2 collected grains of cometary dust freshly ejected from the comet during a fly-by at a speed of 6.1 km s -1. These were captured on aluminum foils and in blocks of silica aerogel. The dust underwent a severe shock during capture. The nature of the shock process depends on the properties of the dust and the collecting media. On the aluminium, the shock process and impact damage is typical of that between high-density (or hard materials) at high velocity, resulting in craters lined with impactor residues. The peak shock pressures are estimated at 60-80 GPa. Two main crater types are seen, simple bowl shaped and multiple pit craters: these reflect the degree of consolidation of the original dust grain. Capture in the low density aerogel was via a more gradual slowing of the dust grains accompanied by a variety of effects on the grains (complete break up of weak grains vs. ablation of well consolidated grains). The relation between the structure of the dust grains and the resulting impact features in both collector materials is discussed. © 2009 American Institute of Physics.

Item Type: Conference or workshop item (Proceeding)
Additional information: Unmapped bibliographic data: LA - English [Field not mapped to EPrints] J2 - AIP Conf. Proc. [Field not mapped to EPrints] AD - School of Physical Sciences, Ingram Building, Univ. of Kent, Canterbury, Kent CT2 7NH, United Kingdom [Field not mapped to EPrints] AD - Impacts and Astromaterials Research Centre (IARC), Dept. of Mineralogy, Natural History Museum, London SW7 5BD, United Kingdom [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints] M3 - Conference Paper [Field not mapped to EPrints] C3 - AIP Conference Proceedings [Field not mapped to EPrints]
Uncontrolled keywords: Aerogel, Comets, Cosmic dust, Impact phenomena
Subjects: Q Science > QB Astronomy > QB651 Planets, Minor
Divisions: Faculties > Sciences > School of Physical Sciences > Centre for Astrophysics and Planetary Sciences
Depositing User: Giles Tarver
Date Deposited: 29 Jan 2016 10:29 UTC
Last Modified: 02 Feb 2016 16:54 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/53882 (The current URI for this page, for reference purposes)
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