Physics
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004jgre..10912s03c&link_type=abstract
Journal of Geophysical Research, Volume 109, Issue E12, CiteID E12S03
Physics
6
Planetology: Comets And Small Bodies: Dust, Planetology: Solar System Objects: Comets, Planetology: Solar System Objects: Extraterrestrial Materials, Planetology: Comets And Small Bodies: Instruments And Techniques, Interplanetary Physics: Interplanetary Dust
Scientific paper
The unpredicted heterogeneity in particle number density in the coma of Wild 2 is consistent with delayed fragmentation to produce small particles from larger aggregates initially ejected from the cometary nucleus. The resultant heterogeneous inner coma results in stochastic variations in particle number and size distribution. Fragmentation can be accelerated after aggregate release by enhanced heating and one or more additional factors such as abrupt depressurization, phase transitions, exothermic chemical reactions, centrifugal forces, and electrostatic repulsion. Certain predicted characteristics of such in-flight disaggregation in coma particle streams correspond to known cometary phenomena.
Brownlee Don E.
Clark Ben C.
Economou Thanasis E.
Green Simon F.
McBride Neil
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