Browsing by Title "The Origin of Presolar Silica Grains in AGB Stars"

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  • The Origin of Presolar Silica Grains in AGB Stars 

    Speck, Angela K.; Bose, M.; Floss, C.; Stadermann, F. J.; Stroud, R. M. (Lunar and Planetary Institute, 2010)
    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 ...