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Detailed Abundances for 28 Metal-poor Stars: Stellar Relics in the Milky Way
David K. Lai, Michael Bolte, Jennifer A. Johnson +3
We present the results of an abundance analysis for a sample of stars with [Fe/H]. The data were obtained with the HIRES spectrograph at Keck Observatory. The set include…
A Search for Binary Stars at Low Metallicity
David K. Lai, Sara Lucatello, Michael Bolte +2
We present initial results measuring the companion fraction of metal-poor stars ([Fe/H]2.0). We are employing the Lick Observatory planet-finding system to make high-precision…
Carbon and Strontium Abundances of Metal-Poor Stars
David K. Lai, Jennifer A. Johnson, Michael Bolte +1
We present carbon and strontium abundances for 100 metal-poor stars measured from R7000 spectra obtained with the Echellette Spectrograph and Imager at the Keck Observatory.…
Accretion of chemically fractionated material on a wide binary with a blue straggler
S. Desidera, R. Gratton, S. Lucatello +2
The components of the wide binary HIP64030=HD 113984 show a large (about 0.25 dex) iron content difference (Desidera et al.~2006 A&A 454, 581). The positions of the components on t…
Na-O Anticorrelation and Horizontal Branches. V. The Na-O anticorrelation in NGC 6441 from Giraffe spectra
R. G. Gratton, S. Lucatello, A. Bragaglia +16
We present an analysis of FLAMES-Giraffe spectra for several bright giants in NGC 6441, to investigate the presence and extent of the Na-O anticorrelation in this anomalous globula…
Na-O Anticorrelation and HB. VI. The chemical composition of the peculiar bulge globular cluster NGC 6388
E. Carretta, A. Bragaglia, R. G. Gratton +7
We present the LTE abundance analysis of high resolution spectra for red giant stars in the peculiar bulge globular cluster NGC 6388. Spectra of seven members were taken using the…