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    Bulbous tracks arising from hypervelocity capture in aerogel

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    Author
    Trigo-Rodríguez, J. M.
    Domínguez, G.
    Burchell, M. J.
    Hörz, F.
    Llorca, J.
    Issue Date
    2008-01-01
    Keywords
    shock heating
    comets
    meteoroids
    ablation
    
    Metadata
    Show full item record
    Citation
    Trigo‐Rodríguez, J. M., Domínguez, G., Burchell, M. J., Hörz, F. and Llorca, J. (2008), Bulbous tracks arising from hypervelocity capture in aerogel. Meteoritics & Planetary Science, 43(1-2), 75-86.
    Publisher
    The Meteoritical Society
    Journal
    Meteoritics & Planetary Science
    URI
    http://hdl.handle.net/10150/656382
    DOI
    10.1111/j.1945-5100.2008.tb00610.x
    Additional Links
    https://meteoritical.org/
    Abstract
    The capture of 81P/Wild 2 cometary particles in aerogel with a well-defined impact velocity (6.1 km s^(1)) has provided a wealth of data concerning the composition of Jupiter-family comets. To interpret this data we must understand the capture processes in the aerogel. A major category of tracks are those with bulbous cavities lined with particle fragments. We present a new model to account for the production of these turnip-shaped impact cavities. The model uses a thermodynamic approach in order to account for the likely expansion of vapors from particles rich in volatile species. Volume measurements of some of the largest Stardust tracks analysed so far, together with theoretical considerations, indicate that for the majority of Stardust cometary aggregate particle impacts, fragmentation of relatively weak impactors (combined with radial expansion of the resulting subgrains) is the leading cause of bulbous track production, while volatile release of vapors played a secondary role.
    Type
    Article
    text
    Language
    en
    ISSN
    1945-5100
    ae974a485f413a2113503eed53cd6c53
    10.1111/j.1945-5100.2008.tb00610.x
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    Meteoritics & Planetary Science, Volume 43, Number 1-2 (2008)

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