3 papers
astro-ph2003
A New Population of Old Stars
I. I. Ivans, C. Sneden, C. R. James +5
We report the results of a coherent study of three chemically anomalous metal-poor ([Fe/H] ~ -2) stars. These objects exhibit unusually low abundances of Mg, Si, Ca (alpha-elements…
astro-ph2001
Metal-Poor Globular Clusters of the Milky Way and Environs
James E. Hesser, Jon P. Fulbright
We review properties of the most metal-deficient globular clusters and halo stars in the local universe as of March 2001, with goals of examining present evidence for the duration…
astro-ph2000
Getting the Red Out: A Stellar Approach to Determining Spatial Variations of Interstellar Dust
I. I. Ivans, C. Sneden, R. P. Kraft +4
By employing two different spectroscopic techniques we have mapped out the variable ISM dust extinction endemic to globular cluster M4. We derive an average E(B-V) reddening of 0.3…