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

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

2011-07-04

arxiv.org/abs/1107.0562v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

5 pages, 2 figures, 1 table, conference proceeding

Scientific paper

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 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 in the range 2 to 10 and the very few high-density graphite grains with 12C/13C around 10.

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