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Updated stellar yields from Asymptotic Giant Branch models
Amanda I. Karakas
An updated grid of stellar yields for low to intermediate-mass thermally-pulsing Asymptotic Giant Branch (AGB) stars are presented. The models cover a range in metallicity Z = 0.02…
Heavy element abundances in planetary nebulae: A theorist's perspective
Amanda I. Karakas, Maria Lugaro
The determination of heavy element abundances from planetary nebula (PN) spectra provides an exciting opportunity to study the nucleosynthesis occurring in the progenitor asymptoti…
A large C+N+O abundance spread in giant stars of the globular cluster NGC 1851
David Yong, Frank Grundahl, Francesca D'Antona +3
Abundances of C, N, and O are determined in four bright red giants that span the known abundance range for light (Na and Al) and s-process (Zr and La) elements in the globular clus…
The Chemical Evolution of Globular Clusters I. Reactive Elements and Non-Metals
Andrea Marcolini, Brad K. Gibson, Amanda I. Karakas +1
We propose a new chemical evolution model aimed at explaining the chemical properties of globular clusters (GC) stars. Our model depends upon the existence of (i) a peculiar pre-en…