Discovery of Ancient Silicate Stardust in a Meteorite

Details Discovery of Ancient Silicate Stardust in a Meteorite Discovery of Ancient Silicate Stardust in a Meteorite

Mar 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sci...303.1496n&link_type=abstract

Science, Volume 303, Issue 5663, pp. 1496-1499 (2004).

Computer Science

113

Scientific paper

We have discovered nine presolar silicate grains from the carbonaceous chondrite Acfer 094. Their anomalous oxygen isotopic compositions indicate formation in the atmospheres of evolved stars. Two grains are identified as pyroxene, two as olivine, one as a glass with embedded metal and sulfides (GEMS), and one as an Al-rich silicate. One grain is enriched in 26Mg, which is attributed to the radioactive decay of 26Al and provides information about mixing processes in the parent star. This discovery opens new means for studying stellar processes and conditions in various solar system environments.

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