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Evolution and nucleosynthesis of extremely metal-poor and metal-free low- and intermediate-mass stars II. s-process nucleosynthesis during the core He flash
Simon W. Campbell, Maria Lugaro, Amanda I. Karakas
Models of primordial and hyper-metal-poor stars with masses similar to the Sun experience an ingestion of protons into the hot core during the core helium flash phase at the end of…
The core helium flash revisited III. From Pop I to Pop III stars
Miroslav Mocak, Simon W. Campbell, Ewald Mueller +1
Degenerate ignition of helium in low-mass stars at the end of the red giant branch phase leads to dynamic convection in their helium cores. One-dimensional (1D) stellar modeling of…
Is Extra Mixing Really Needed in Asymptotic Giant Branch Stars?
Amanda I. Karakas, Simon W. Campbell, Richard J. Stancliffe
(Abridged) We demonstrate that the amount of extra mixing required to fit the observed low C/N and 12C/13C ratios in first giant branch (FGB) stars is also sufficient to explain th…