Presolar Grains as Probes of Supernova Nucleosynthesis.

In contrast to this expectation, a negative trend was observed among X grains (Liu et al. 2024a ).

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( 2015 ), the explosive H-burning zone ( 30 Si-rich) produces much higher 26 Al/ 27 Al ratios than the C/Si zone ( 28 Si-rich), which consequently implies a positive trend between 26 Al/ 27 Al and \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$\delta ^{30}$\end{document} δ 30 Si.

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Finally, investigations into presolar grains suggest an interesting trend.

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