Shingles, Luke; Doherty, Carolyn L; Karakas, Amanda; Stancliffe, R J; Lattanzio, John; Lugaro, Maria
There is now strong evidence that some stars have been born with He mass fractions as high as Y≈0.40 (e.g. in ω Centauri). However, the advanced evolution, chemical yields, and final fates of He-rich stars are largely unexplored. We investigate the consequences of He-enhancement on the evolution and nucleosynthesis of intermediate-mass asymptotic giant branch (AGB) models of 3, 4, 5, and 6 M⊙ with a metallicity of Z = 0.0006 ([Fe/H] ≈-1.4). We compare models with He-enhanced compositions (Y =...[Show more]
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