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Spectroscopy of Main Sequence Stars in Globular Clusters
Russell Cannon, Gary Da Costa, John Norris +2
Although globular clusters are generally chemically homogeneous, substantial abundance variations are sometimes seen even among unevolved main sequence stars, especially for the CN…
A Subaru/HDS study of Lead (Pb) abundances in eight s-process-element-rich, metal-poor stars
W. Aoki, S. G. Ryan, J. E. Norris +2
We report the abundances of neutron-capture elements in eight carbon-rich, metal-poor (-2.7=<[Fe/H]=<-1.9) stars observed with the Subaru Telescope High Dispersion Spectrograph. Th…
Chemical Composition of the Carbon-rich, Extremely Metal-Poor Star CS 29498--043: A New Class of Extremely Metal-Poor Stars with Excesses of Magnesium and Silicon
W. Aoki, J. E. Norris, S. G. Ryan +2
We analyze a high-resolution, high signal-to-noise spectrum of the carbon-rich, extremely metal-poor star CS29498-043, obtained with the Subaru Telescope High Dispersion Spectrogra…
Distant field BHB stars and the mass of the Galaxy I: Classification of halo A-type stars
L. Clewley, S. J. Warren, P. C. Hewett +3
This is the first in a series of three papers presenting a new calculation of the mass of the Galaxy based on radial velocities and distances measured for a sample of some 100 fain…
Deciphering The Last Major Invasion of the Milky Way Galaxy
Gerard Gilmore, Rosemary F. G. Wyse, John E. Norris
We present first results from a spectroscopic survey of 2000 F/G stars 0.5--5kpc from the Galactic plane, obtained with the 2dF facility on the AAT. These data show the mean rotati…
Metal Abundances and Kinematics of Bright Metal-Poor Giants Selected from the LSE Survey: Implications for the Metal-Weak Thick Disk
Timothy C. Beers, John S. Drilling, Silvia Rossi +5
We report medium-resolution (1-2 A) spectroscopy and broadband (UBV) photometry for a sample of 39 bright stars (the majority of which are likely to be giants) selected as metal-de…