Evolution and nucleosynthesis of primordial low mass stars

Details Evolution and nucleosynthesis of primordial low mass stars Evolution and nucleosynthesis of primordial low mass stars

2003-11-26

arxiv.org/abs/astro-ph/0311580v1

Astrophys.J. 609 (2004) 1035-1044

Astronomy and Astrophysics

Astrophysics

Scientific paper

10.1086/421254

We discuss in detail the evolutionary properties of low mass stars M< 1 M(Solar) having metallicity lower than Z=10^(-6) from the pre- main sequence up to (almost) the end of the Asymptotic Giant Branch phase. We also discuss the possibility that the large [C,N/Fe] observed on the surface of the most Iron poor star presently known, HE0107-5240, may be attributed to the autopollution induced by the penetration of the He convective shell into the H rich mantle during the He core flash of a low mass, very low metallicity star. On the basis of a quite detailed analysis, we conclude that the autopollution scenario cannot be responsible for the observed chemical composition of HE0107-5240.

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