Physics
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusmsa32a..09m&link_type=abstract
American Geophysical Union, Spring Meeting 2002, abstract #SA32A-09
Physics
6027 Ionospheres: Evolution, 6205 Asteroids And Meteoroids, 6213 Dust, 6245 Meteors, 2447 Modeling And Forecasting
Scientific paper
The development of a realistic model of meteor effects on the ionosphere requires accurate knowledge of the composition of the meteoroids that give rise to the meteor effects. This pauses a serious problem as most of the meteoroid streams arise from cometary dust, while most of the composition information are derived from meteorite falls. The conundrum arises from the fact that the surviving meteorites arise from the fragmentation of asteroids. The relation between the two is not straightforward. It is known that comets contain many chemicals that are not commonly associated with meteorites, e.g. HCN and cyanides in general, water, and organic materials. Composition measurements of Comet Halley taken the Giotto spacecraft (Gr\x81n and Jessberger 1990) are significantly different from meteorite data, e.g. (Lodders and Fegley 1998). These differences will be highlighted in this presentation and their implications will be discussed. Gr\x81n, E. and E. K. Jessberger (1990). Dust. Physics and Chemistry of Comets. W. F. Huebner. Heidelberg, Springer Verlag: 113-176. Lodders, K. and J. Fegley, B. (1998). The Planetary Scientist's Companion. New York, Oxford.
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