Physics
Scientific paper
Apr 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990nascp3061...59t&link_type=abstract
In its Carbon in the Galaxy: Studies from Earth and Space p 59-111 (SEE N90-27562 21-88)
Physics
47
Carbon, Carbonaceous Meteorites, Diamonds, Flames, Interplanetary Dust, Shock Waves, Soot, Amorphous Materials, Chemical Properties, Collisions, High Pressure, Interstellar Gas, Stars, Stellar Evolution
Scientific paper
The formation of carbon dust in the outflow from stars and the subsequent evolution of this so called stardust in the interstellar medium is reviewed. The chemical and physical processes that play a role in carbon stardust formation are very similar to those occurring in sooting flames. Based upon extensive laboratory studies of the latter, the structure and physical and chemical properties of carbon soot are reviewed and possible chemical pathways towards carbon stardust are discussed. Grain-grain collisions behind strong interstellar shocks provide the high pressures required to transform graphite and amorphous carbon grains into diamond. This process is examined and the properties of shock-synthesized diamonds are reviewed. Finally, the interrelationship between carbon stardust and carbonaceous meteorites is briefly discussed.
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