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Paper: |
Bridging the Mass Divide: Super & Massive AGB Star Yields |
Volume: |
458, Galactic Archaeology: Near-Field Cosmology and the Formation of the Milky Way |
Page: |
39 |
Authors: |
Doherty, C. L.; Gil-Pons, P.; Lau, H. H. B.; Lattanzio, J. C. |
Abstract: |
Super Asymptotic Giant Branch Stars (Super AGBs) lie in the mass range
6-11 M☉, which bridges the divide between low/intermediate mass
AGB and massive stars. During the thermally pulsing phase of evolution
competition between hot bottom burning (HBB) and third dredge up (3DU)
events determine the stellar yields. Obtaining these yields is far
more computationally demanding than those of most AGB stars because
Super AGBs undergo up to a few thousand thermal pulses. We describe
results from evolutionary and nucleosynthetic calculations for these
stellar models. We examine element production in these Super AGB
stars over time, with results from five metallicities spanning the
range Z = 0.02–10-4 ([Fe/H] 0 to -2.3). Super AGB star
nucleosynthetic yields have hitherto been neglected in galactic
chemical evolution modelling. |
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