Shock processing of interstellar dust - Diamonds in the sky

Details Shock processing of interstellar dust - Diamonds in the sky Shock processing of interstellar dust - Diamonds in the sky

Aug 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...319l.109t&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 319, Aug. 15, 1987, p. L109-L113.

Astronomy and Astrophysics

Astrophysics

80

Amorphous Materials, Cosmic Dust, Interstellar Matter, Metamorphism (Geology), Meteoritic Diamonds, Shock Waves, Crystal Lattices, Interstellar Gas, Interstellar Magnetic Fields, Phase Transformations, Shock Fronts, Sputtering

Scientific paper

The processing of interstellar dust grains by strong shock waves is studied, with the emphasis on the effects of grain-grain collisions. Such collisions provide the high pressures required to transform interstellar graphite and amorphous carbon grains into diamonds. Diamond metamorphism is as important for the destruction of such grains as vaporization and sputtering. It is calculated that about 5 percent of the C is expected to be in the form of 5-100 A diamonds in the interstellar medium. These results support the suggested interstellar origin for the recently discovered small meteoritic diamonds by providing a feasible interstellar formation mechanism.

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