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Chemical Abundances in Twelve Red Giants of the Large Magellanic Cloud from High-Resolution Infrared Spectroscopy
V. V. Smith, K. H. Hinkle, K. Cunha +10
High-resolution infrared spectra (R=50,000) have been obtained for twelve red-giant members of the LMC with the Gemini South 8.3-meter telescope plus Phoenix spectrometer. Quantita…
Exploring Halo Substructure with Giant Stars III: First Results from the Grid Giant Star Survey and Discovery of a Possible Nearby Sagittarius Tidal Structure in Virgo
A. Kundu, S. R. Majewski, J. Rhee +14
We describe first results of a spectroscopic probe of selected fields from the Grid Giant Star Survey. Multifiber spectroscopy of several hundred stars in a strip of eleven fields…
Carbon Isotopic Abundances in the Red Giants of Omega Centauri (NGC5139)
Verne V. Smith, Donald M. Terndrup, Nicholas B. Suntzeff
Carbon-12 and carbon-13 abundances are measured in eleven red-giant members of the globular cluster Omega Centauri via observations of first-overtone CO bands near 2.3 microns. The…
Boron in the Small Magellanic Cloud: A Novel Test of Light Element Production
A. M. Brooks, K. A. Venn, D. L. Lambert +3
Hubble Space Telescope STIS observations of the B III resonance line at 2066A have been obtained and analyzed for two Small Magellanic Cloud (SMC) B-type stars. While boron is not…
The Evolution of Copper in the Globular Cluster Omega Centauri
K. Cunha, V. V. Smith, N. B. Suntzeff +3
Copper abundances are presented for 40 red-giant stars in Omega Cen as well as 15 red-giant members of the globular clusters NGC288, NGC362, NGC3201, NGC6752, and M4. A comparison…
Chemical Abundances of OB Stars with High Projected Rotational Velocities
Simone Daflon, Katia Cunha, Keith Butler +1
Elemental abundances of carbon, nitrogen, oxygen, magnesium, aluminum, and silicon are presented for a sample of twelve rapidly rotating OB star (v sin i > 60 km s^-1) members of t…