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    Decoherence time scales for "meteoroid streams"

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    Author
    Pauls, A.
    Gladman, B.
    Issue Date
    2005-01-01
    Keywords
    Dynamics
    Streams
    meteorites
    
    Metadata
    Show full item record
    Citation
    Pauls, A., & Gladman, B. (2005). Decoherence time scales for “meteoroid streams”. Meteoritics & Planetary Science, 40(8), 1241-1256.
    Publisher
    The Meteoritical Society
    Journal
    Meteoritics & Planetary Science
    URI
    http://hdl.handle.net/10150/656034
    DOI
    10.1111/j.1945-5100.2005.tb00186.x
    Additional Links
    https://meteoritical.org/
    Abstract
    We explore the orbital dynamics of Earth-crossing objects with the intent to understand the time scales under which an "orbital stream" of material could produce time-correlated meteorite falls. These meteoroid streams have been suggested to be associated with three well-known meteoritedropping fireballs (Innisfree, Peekskill, and Příbram). We have performed two different analyses of the statistical significance of the "orbital similarity," in particular calculating how often orbits of the same level of similarity would come from a random sample. Secondly, we have performed extremely detailed numerical integrations related to these three cases, and we find that if they were streams of objects in similar orbits, then they would become "decoherent" (in the sense that the day-of-fall of meteorites of these streams become almost random) on time scales of 10^4-10^5 yr. Thus, an extremely recent breakup would be required, much more recent that the cosmic ray exposure ages of the recovered falls in each case. We conclude that orbital destruction is too efficient to allow the existence of long-lived meteoroid streams and that the statistical evidence for such streams is insufficient; random fall patterns show comparable levels of clustering.
    Type
    Article
    text
    Language
    en
    ISSN
    1945-5100
    ae974a485f413a2113503eed53cd6c53
    10.1111/j.1945-5100.2005.tb00186.x
    Scopus Count
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    Meteoritics & Planetary Science, Volume 40, Number 8 (2005)

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