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Normal and Outlying Populations of the Milky Way Stellar Halo at [Fe/H] < -2
Judith Cohen, Norbert Christlieb, Ian Thompson +5
From detailed abundance analysis of >100 Hamburg/ESO candidate extremely metal-poor (EMP) stars we find 45 with [Fe/H] < -3.0 dex. We identify a heretofore unidentified group: Ca-d…
Chemistry of the Sagittarius Dwarf Galaxy: a Top-Light IMF, Outflows and the R-Process
Andrew McWilliam, George Wallerstein, Marta Mottini
From chemical abundance analysis of stars in the Sagittarius dwarf spheroidal galaxy (Sgr), we conclude that the alpha-element deficiencies cannot be due to the Type Ia supernova (…
Chemical Abundance Evidence of Enduring High Star Formation Rates in an Early Type Galaxy: High [Ca/Fe] in NGC 5128 Globular Clusters
J. E. Colucci, M. F. Duran, R. A. Bernstein +1
We present [Fe/H], ages, and Ca abundances for an initial sample of 10 globular clusters in NGC 5128 obtained from high resolution, high signal-to-noise ratio echelle spectra of th…
Spectrum Syntheses of High Resolution Integrated Light Spectra of Galactic Globular Clusters
Charli M. Sakari, Matthew Shetrone, Kim Venn +2
Spectrum syntheses for three elements (Mg, Na, and Eu) in high-resolution integrated light spectra of the Galactic globular clusters 47 Tuc, M3, M13, NGC 7006, and M15 are presente…
A comprehensive chemical abundance study of the outer halo globular cluster M 75
Nikolay Kacharov, Andreas Koch, Andrew McWilliam
Context: M 75 is a relatively young Globular Cluster (GC) found at 15 kpc from the Galactic centre at the transition region between the inner and outer Milky Way halos. Aims: Our a…
Extragalactic Globular Cluster Populations from High Resolution Integrated Light Spectra
J. E. Colucci, R. A. Bernstein, A. McWilliam +1
We present a comparison of high-resolution, integrated-light, detailed chemical abundances for Galactic and extragalactic globular clusters in both massive galaxies and dwarf galax…