Computer Science
Scientific paper
Dec 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983polre..30...84w&link_type=abstract
(National Institute of Polar Research, Symposium on Antarctic Meteorites, 8th, Tokyo, Japan, Feb. 17-19, 1983) National Institut
Computer Science
2
Chondrites, Chondrule, Inclusions, Meteoritic Composition, Shock Heating, Solar Corona, Aluminum Compounds, Calcium Compounds, Meteoritic Microstructures
Scientific paper
The solar system is understood to have formed by the continued infall of interstellar gas and dust to an accretion disk. The interstellar material would encounter the nebula at nearly the free-fall velocity, and would have very great kinetic energy. Dust particles falling through the nebula would dissipate their mechanical energy as heat, as they experienced aerodynamic drag in the nebular gases. Heating and deceleration are calculated for a simple infall model. It is found that 1-mm dust aggregations falling into the present zone of the terrestial planets would be melted, and would cool at about 350 K/hr. Dynamic crystallization experiments have shown tha the crystalline textures of meteoritic chondrules were produced during cooling at a similar rate.
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