Si and C isotopes in presolar silicon carbide grains from AGB stars

Larry R Nittler, Roberto Gallino, Maria Anna Lugaro, Oscar Straniero, I Dominguez, Ernst Kunibert Zinner

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

7 Citations (Scopus)


We compare the Si and C isotopic data of presolar SiC grains with predictions of AGB star models computed with a wide range of input parameters. The models confirm an AGB star origin for SiC grains of type mainstream, Y and Z. Cool bottom processing during the ACB phase is required to explain simultaneously the Si and C data for Z grains. The Z grain data together with the new models indicate that the interstellar Si-29/Si-28 ratio was high at low metallicity, relative to models of Galactic Chemical Evolution.
Original languageEnglish
Title of host publicationNuclear Physics A
EditorsL Buchman, M Comyn, J Thomson
Place of PublicationAmsterdam Netherlands
Pages348c - 351c
Number of pages4
ISBN (Print)0375-9474
Publication statusPublished - 2005
Externally publishedYes
EventInternational Symposium on Nuclei in the Cosmos 2004 - Vancouver, Canada
Duration: 19 Jul 200423 Jul 2004
Conference number: 8th


ConferenceInternational Symposium on Nuclei in the Cosmos 2004

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