Interstellar graphite in meteorites

Details Interstellar graphite in meteorites Interstellar graphite in meteorites

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990natur.345..238a&link_type=abstract

Nature (ISSN 0028-0836), vol. 345, May 17, 1990, p. 238-240. Research supported by NASA, NSF, and FFWF.

Computer Science

144

Carbonaceous Chondrites, Graphite, Interstellar Matter, Meteoritic Composition, Neon, Rare Gases, Meteorites, Composition, Graphite, Photomicrographs, Laboratory Studies, Samples, Meteorite, Murchison, Cm2 Chondrites, C Chondrites, Formation, Stony Meteorites, Grains, Origin, Procedure, Ion Probe Methods, Density, Abundance, Description, Carbon, Hypotheses, Thermodynamics, Techniques

Scientific paper

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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