Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988icar...74..446r&link_type=abstract
Icarus (ISSN 0019-1035), vol. 74, June 1988, p. 446-453.
Astronomy and Astrophysics
Astrophysics
7
Chondrites, Cosmic Dust, Graphite, Interplanetary Dust, Interstellar Matter, Meteoritic Composition, Grains, Interstellar Chemistry, Surface Energy, Interplanetary Dust, Meteorites, Graphite, Chondritic Material, Origin, Formation, Thermal Effects, Annealing, Carbon, Radiation, Grain Size, Distribution, Classification, Comparisons, Nomenclature, Hypotheses
Scientific paper
Vapor phase-condensed primary and secondary graphites require prolonged solid-state thermal annealing and are less likely than amorphous graphitizable carbons to occur in the interstellar medium as dust. Some unknown fraction of this amorphous carbon may be converted to secondary graphite by radiative annealing due to UV photons. Grain size distribution may differentiate between primary and secondary graphites; secondary graphite should, moreover, be associated with poorly graphitized carbon. Small, as-yet undetected amounts of small secondary graphite particles may exist in carbon-rich astrophysical environments.
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