Nucleosynthesis origin of PG 1159 stars, Sakurai's object and of rare subclasses of presolar grains

R. Gallino, O. Straniero, E. Zinner +4

We discuss theoretical AGB predictions for hydrogen-deficient PG 1159 stars and Sakurai's object, which show peculiar enhancements in He, C and O, and how these enhancements may be…