Do meteoritic silicon carbide grains originate from asymptotic giant branch stars of super-solar metallicity?
We compare literature data for the isotopic ratios of Zr, Sr, and Ba from analysis of single meteoritic stardust silicon carbide (SiC) grains to new predictions for the slow neutron-capture process (the s process) in metal-rich asymptotic giant branch (AGB) stars. The models have initial metallicities (solar) and (twice-solar) and initial masses 2–4.5 , selected such as the condition C/O > 1 for the formation of SiC is achieved. Because of the higher Fe abundance, the twice-solar metallicity...[Show more]
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|Source:||Geochimica et Cosmochimica Acta|
|01_Lugaro_Do_meteoritic_silicon_carbide_2018.pdf||2.42 MB||Adobe PDF||Request a copy|
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