Paper:	Nucleosynthesis Origin of PG 1159 Stars, Sakurai's Object, and Rare Subclasses of Presolar Grains
Volume:	445, Why Galaxies Care about AGB Stars II: Shining Examples and Common Inhabitants
Page:	143
Authors:	Gallino, R.; Straniero, O.; Zinner, E.; Jadhav, M.; Piersanti, L.; Cristallo, S.; Bisterzo, S.
Abstract:	We discuss theoretical AGB-stage predictions for the hydrogen-deficient PG 1159 stars and Sakurai's object, which show peculiar enhancements in He, C, and O, and how these enhancements may be understood in the framework of a very late thermal pulse nucleosynthetic event. We then discuss the nucleosynthesis origin of rare subclasses of presolar grains extracted from carbonaceous meteorites, the SiC AB grains showing low 12C/13C ratios in the range 2 to 10 and the very rare high-density graphite grains with 12C/13C around 10.

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