The Origin of Presolar Silica Grains in AGB Stars

Details The Origin of Presolar Silica Grains in AGB Stars The Origin of Presolar Silica Grains in AGB Stars

Mar 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010lpi....41.1812b&link_type=abstract

41st Lunar and Planetary Science Conference, held March 1-5, 2010 in The Woodlands, Texas. LPI Contribution No. 1533, p.1812

Physics

1

Scientific paper

We have found two presolar silica grains in ALH A77307, which exhibit
excesses in 17O but are normal in 18O. Silicon-oxide grains probably
form during rapid cooling under non-equilibrium conditions in O-rich AGB
stars with low Mg/Si ratios.

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