Analysis of factors contributing to bulbous capture tracks from cometary dust particles in Stardust aerogel collector

Dominguez, Gerardo and Trigo-Rodriguez, Josep M. and Burchell, Mark J. and Horz, Fred and Llorca, Jordi and Tsou, Peter and Anderson, Bill (2007) Analysis of factors contributing to bulbous capture tracks from cometary dust particles in Stardust aerogel collector. Meteoritics & Planetary Science, 42 (S8). A37-A37. ISSN 1086-9379. (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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The capture of cometary dust grains in aerogel at the well defined impact velocity of 6.1 km/s resulted in the production of a range of impact cavity morphologies. These tracks range from the classical carrot shaped tracks (type A) seen in laboratory experiments with efractory-solid projectiles, to bulbous tracks with “turnip”-like properties and a stylus (type B), to bulbous stubby tracks (type C) [1,2]. These morphologies must reflect the underlying variati on in the structure and strength of cometary dust grains. The cap ture of cometary dust grains also presents the possibility that the chemical content of projec- tiles, in the form of volatiles that are released during capture, also contributed to bulbous track features and analyses of the terminal particles and track residues suggest that the volatile content of the projectiles, released preferentially during capture, would have contributed to the range of morphologies seen in the Stardust cometary dust tracks. An additional contributor to track bulb production could come from par ticle fragmentation during cap-ture and here we present a quantita tive analysis of the factors that contribute to the production of bulbous impact cavities in aerogel.

Item Type: Article
Additional information: Meeting Abstract
Subjects: Q Science
Divisions: Faculties > Science Technology and Medical Studies > School of Physical Sciences > Centre for Astrophysics and Planetary Sciences
Depositing User: Mark Burchell
Date Deposited: 09 Jul 2008 14:39
Last Modified: 30 Apr 2014 11:29
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