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A Puzzle Involving Galactic Bulge Microlensing Events
Judith G. Cohen, Andrew Gould, Ian B. Thompson +7
We study a sample of 16 microlensed Galactic bulge main sequence turnoff region stars for which high dispersion spectra have been obtained with detailed abundance analyses. We demo…
Globular Cluster Abundances and What They Can Tell Us About Galaxy Formation
Judith G. Cohen
We review the properties of globular clusters which make them useful for studying the Galactic halo, Galactic chemical evolution, and the early stages of the formation of the Milky…
An HST/WFPC2 Survey of Bright Young Clusters in M31 III. Structural Parameters
P. Barmby, S. Perina, M. Bellazzini +6
Surface brightness profiles for 23 M31 star clusters were measured using images from the Wide Field Planetary Camera 2 on the Hubble Space Telescope, and fit to two types of models…
M31 Globular Cluster Abundances from High-Resolution, Integrated-Light Spectroscopy
J. E. Colucci, R. A. Bernstein, S. Cameron +2
We report the first detailed chemical abundances for 5 globular clusters (GCs) in M31 from high-resolution (R ~ 25,000) spectroscopy of their integrated light. These GCs are the fi…
A New Solution for the Dispersive Element in Astronomical Spectrographs
Harland W. Epps, Judith G. Cohen, J. Christopher Clemens
We present a new solution for the dispersive element in astronomical spectrographs, which in many cases can provide an upgrade path to enhance the spectral resolution of existing m…
The Chemical Evolution of the Draco Dwarf Spheroidal Galaxy
Judith G. Cohen, Wenjin Huang
We present an abundance analysis based on high resolution spectra of 8 stars selected to span the full range in metallicity in the Draco dwarf spheroidal galaxy. We find [Fe/H] for…