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Presolar SiC Grains of Type AB with Isotopically Light Nitrogen: Contributions from Supernovae?

Hoppe, P.; Pignatari, Marco; Amari, S.

Authors

P. Hoppe

S. Amari



Abstract

Primitive solar system materials contain presolar grains that formed in the winds of evolved stars and in the ejecta of stellar explosions. Here, we report on NanoSIMS measurements of C-, N-, Al–Mg-, Si-, and S-isotopic compositions of 10 submicrometer-sized presolar SiC grains of Type AB from the Murchison meteorite. Except for one grain with the highest 12C/13C ratio we find good correlations between 12C/13C, 14N/15N, and 26Al/27Al. The correlations are well explained by a 25 M⊙ supernova (SN) model that considers H ingestion into the He shell. The comparison of our data with the SN model suggests that SNe might have contributed not only AB grains with heavy N, as suggested previously, but also some with light N.

Journal Article Type Conference Paper
Publication Date Aug 20, 2019
Journal Springer Proceedings in Physics
Print ISSN 0930-8989
Electronic ISSN 1867-4941
Publisher Springer Verlag
Peer Reviewed Peer Reviewed
Volume 219
Pages 373-376
APA6 Citation Hoppe, P., Pignatari, M., & Amari, S. (2019). Presolar SiC Grains of Type AB with Isotopically Light Nitrogen: Contributions from Supernovae?. Springer Proceedings in Physics, 219, 373-376. https://doi.org/10.1007/978-3-030-13876-9_68
DOI https://doi.org/10.1007/978-3-030-13876-9_68
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