Supernova Shock-wave-induced CO-formation of Glassy Carbon and Nanodiamond

Details Supernova Shock-wave-induced CO-formation of Glassy Carbon and Nanodiamond Supernova Shock-wave-induced CO-formation of Glassy Carbon and Nanodiamond

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011apj...738l..27s&link_type=abstract

The Astrophysical Journal Letters, Volume 738, Issue 2, article id. L27 (2011).

Astronomy and Astrophysics

Astronomy

4

Astrochemistry, Dust, Extinction, Meteorites, Meteors, Meteoroids, Shock Waves

Scientific paper

Nanodiamond (ND) was the first extrasolar dust phase to be identified in meteorites. However, the 2 nm average size of the NDs precludes isotopic analysis of individual particles, and thus their origin(s) remains controversial. Using electron microscopy with subnanometer resolution, we show that ND separates from the Allende and Murchison meteorites are actually a two-phase mixture of ND and glassy carbon. This phase mixture is likely the product of supernova shock-wave transformation of pre-formed organics in the interstellar medium (ISM). The glassy carbon-ND mixture is also a plausible contributor to the 2175 Å extinction feature in the diffuse ISM.

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