313 citations · 777 across the 12 of their papers we have counts for
17 papers
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…
The impact of the 18F(a,p)21Ne reaction on fluorine production in AGB stars
Amanda I. Karakas, Hye Young Lee, Maria Lugaro +2
The recent experimental evaluation of the 18F(a,p)21Ne reaction rate, when considering its associated uncertainties, presented significant differences compared to the theoretical H…
Heavy element abundances in giant stars of the globular clusters M4 and M5
David Yong, Amanda I. Karakas, David L. Lambert +2
We present a comprehensive abundance analysis of 27 heavy elements in bright giant stars of the globular clusters M4 and M5 based on high resolution, high signal-to-noise ratio spe…
Chemical abundances in giants stars of the tidally disrupted globular cluster NGC 6712 from high-resolution infrared spectroscopy
David Yong, Jorge Melendez, Katia Cunha +3
We present abundances of C, N, O, F, Na, and Fe in six giant stars of the tidally disrupted globular cluster NGC 6712. The abundances were derived by comparing synthetic spectra wi…
The impact of the 18F(a,p)21Ne reaction on asymptotic giant branch nucleosynthesis
Amanda Karakas, Hye Young Lee, Maria Lugaro +2
We present detailed models of low and intermediate-mass asymptotic giant branch (AGB) stars with and without the 18F(a,p)21Ne reaction included in the nuclear network, where the ra…