Physics – Nuclear Physics
Scientific paper
Jul 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005nupha.758..348n&link_type=abstract
Nuclear Physics A, Vol. 758, p.348-351
Physics
Nuclear Physics
1
Scientific paper
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 AGB 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 29Si/28Si ratio was high at low metallicity, relative to models of Galactic Chemical Evolution.
Dominguez Inmaculada
Gallino Roberto
Lugaro Maria
Nittler Larry R.
Straniero Oscar
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