Atypical Magnesium Abundances in Oxygen- Rich Stardust: Nanosims and Auger Analyses
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The use of Auger spectroscopy for the in situ elemental characterization of sub-micrometer presolar grains
available online at http://meteoritics.org The use of Auger spectroscopy for the in situ elemental characterization of sub-micrometer presolar grains Frank J. STADERMANN1*, Christine FLOSS1, Maitrayee BOSE1, and A. Scott LEA2 1Laboratory for Space Sciences, Physics Department, Washington University, CB 1105, 1 Brookings Drive, St. Louis, Missouri 63130, USA 2Pacific Northwest National Laborator...
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Introduction: Presolar silicate grains have been abundantly identified since their first discovery less than a decade ago [1,2,3]. The O isotopic compositions of both silicate and oxide stardust indicate the vast majority (>90%) condensed around O-rich asymptotic giant branch (AGB) stars. Though both presolar phases have average sizes of ~300 nm, grains larger than 1 μm are extremely uncommon f...
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