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Oxygen in the early Galaxy: OH lines as tracers of oxygen abundance in extremely metal-poor giant stars
A. Kucinskas, V. Dobrovolskas, P. Bonifacio +4
Oxygen is a powerful tracer element of Galactic chemical evolution. Unfortunately, only a few oxygen lines are available in the ultraviolet-infrared stellar spectra for the reliabl…
Clues on the Galactic evolution of sulphur from star clusters
E. Caffau, L. Monaco, M. Spite +6
(Abridged) The abundances of alpha-elements are a powerful diagnostic of the star formation history and chemical evolution of a galaxy. Sulphur, being moderately volatile, can be r…
High-resolution abundance analysis of very metal-poor r-I stars
C. Siqueira-Mello, V. Hill, B. Barbuy +9
Moderately r-process-enriched stars (r-I) are at least four times as common as those that are greatly enriched in r-process elements (r-II), and the abundances in their atmospheres…