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Chemical Composition of the Planet-Harboring Star TrES-1
A. Sozzetti, D. Yong, B. W. Carney +3
We present a detailed chemical abundance analysis of the parent star of the transiting extrasolar planet TrES-1. Based on high-resolution Keck/HIRES and HET/HRS spectra, we have de…
Elemental Abundance Ratios in Stars of the Outer Galactic Disk. III. Cepheids
David Yong, Bruce W. Carney, Luisa de Almeida +1
We present metallicities, [Fe/H], and elemental abundance ratios, [X/Fe], for a sample of 24 Cepheids in the outer Galactic disk. The sample have Galactocentric distances covering…
Rubidium and lead abundances in giant stars of the globular clusters M 13 and NGC 6752
David Yong, Wako Aoki, David L. Lambert +1
We present measurements of the neutron-capture elements Rb and Pb in five giant stars of the globular cluster NGC 6752 and Pb measurements in four giants of the globular cluster M…
Mg isotope ratios in giant stars of the globular clusters M 13 and M 71
David Yong, Wako Aoki, David L. Lambert
We present Mg isotope ratios in 4 red giants of the globular cluster M 13 and 1 red giant of the globular cluster M 71 based on spectra obtained with HDS on the Subaru Telescope. W…
Elemental Abundance Ratios in Stars of the Outer Galactic Disk. II. Field Red Giants
Bruce W. Carney, David Yong, Luisa de Almeida +1
We summarize a selection process to identify red giants in the direction of the southern warp of the Galactic disk, employing VI_C photometry and multi-object spectroscopy. We also…
Elemental Abundance Ratios in Stars of the Outer Galactic Disk. I. Open Clusters
David Yong, Bruce W. Carney, Luisa de Almeida
We summarize radial velocity studies of selected stars in the old, distant clusters Berkeley 20, Berkeley 21, NGC 2141, Berkeley 29, and Berkeley 31. Three members of M67 were obse…