Can the Leonid meteors tell us if comets have chondrules and CAIs?

Details Can the Leonid meteors tell us if comets have chondrules and CAIs? Can the Leonid meteors tell us if comets have chondrules and CAIs?

Sep 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002dps....34.2707c&link_type=abstract

American Astronomical Society, DPS Meeting #34, #27.07; Bulletin of the American Astronomical Society, Vol. 34, p.887

Astronomy and Astrophysics

Astronomy

Scientific paper

Studies of the Leonid meteor showers over the past few years have yielded a wealth of results relevant to the structure and composition of cometary solids. One of our goals is to test the existence of chondrules and Ca-Al-rich inclusions (CAIs) in comets based on meteor observations. Chondrule-sized objects would be too faint to study in most meteor showers, but the high velocity ( 72 km/sec) of the Leonids (comet Tempel-Tuttle) make these small objects produce meteors in the range of Vmag +3 or +4. There is little consensus about the formation mechanisms for chondrules and CAIs. However, one prominent model (the "X-wind" model [1]) explicitly predicts that chondrules and CAIs will be present in comets. Hence, observational constraints on the presence or absence of chondrules and CAIs in comet Tempel-Tuttle are likely to contribute to a better understanding of their formation process. [1] F. H. Shu et al. (2001) ApJ. 548, 1029.

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