NASA NTRS · 19900048094
Interstellar graphite in meteorites
Abstract
Graphite grains 1-4 microns in diameter have been identified in the Murchison C2 chondrite. The interstellar origin of these grains is demonstrated by their C-12/C-13 ratio, which ranges from 0.09 to 16 times the solar system value, and by the presence of nearly monoisotopic Ne-22 from the decay of Na-22. The grains apparently formed in the outflows of n novae and red giants, and demonstrate that graphite can form as a circumstellar condensate.
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Amari, Sachiko, Anders, Edward, Virag, Alois, Zinner, Ernst. 1990-05-17. Interstellar graphite in meteorites. https://ntrs.nasa.gov/citations/19900048094
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