Heck, Philipp; Gyngard, Frank; Ott, Ulrich; Meier, Matthias M.M.; Avila, Janaina; Amari, Sachiko; Zinner, Ernst; Lewis, Roy S; Baur, Heinrich; Wieler, Rainer
The time span between the formation of presolar grains in stellar outflows and their incorporation into early solar-system solids is poorly constrained. Knowledge of this time span is essential for a better understanding of the processing of grains in the interstellar medium (ISM) and formation processes of the solar system. Here, we report interstellar residence times of 3-1100 Myr for large (5-50 μm) presolar SiC grains, based on their content of He and Ne produced by Galactic cosmic rays. A...[Show more]
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