The ${}^{13}C$-pockets in AGB Stars and Their Fingerprints in Mainstream SiC Grains

Abstract

We identify three isotopic tracers that can be used to constrain the ${}^{13}C$-pocket and show the correlated isotopic ratios of Sr and Ba in single mainstream presolar SiC grains. These newly measured data can be explained by postprocess AGB model calculations with large ${}^{13}C$-pockets with a range of relatively low ${}^{13}C$ concentrations, which may suggest that multiple mixing processes contributed to the ${}^{13}C$-pocket formation in parent AGB stars.

References in corpus (4)

• The s-Process in Rotating Asymptotic Giant Branch Stars
• The effects of rotation on the s-process nucleosynthesys in Asymptotic Giant Branch stars
• Barium Isotopic Composition of Mainstream Silicon Carbides from Murchison: Constraints for s-Process Nucleosynthesis in AGB Stars
• The 13C-Pocket Structure in AGB Models: Constraints from Zirconium Isotope Abundances in Single Mainstream SiC Grains