213 citations · 383 across the 5 of their papers we have counts for
7 papers
Variability of Be Stars in Southern Open Clusters
M. Virginia McSwain, Wenjin Huang, Douglas R. Gies
We recently discovered a large number of highly active Be stars in the open cluster NGC 3766, making it an excellent location to study the formation mechanism of Be star disks. To…
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…
Clues to the Metallicity Distribution in the Galactic Bulge: Abundances in MOA-2008-BLG310 and MOA-2008-BLG311
Judith G. Cohen, Ian B. Thompson, Takahiro Sumi +5
We present abundance analyses based on high dispersion and high signal-to-noise ratio Magellan spectra of two highly microlensed Galactic bulge stars in the region of the main sequ…
Clues to the Metallicity Distribution in the Galactic Bulge: Abundances in OGLE-2007_BLG-349S
Judith G. Cohen, Wenjin Huang, A. Udalski +2
We present an abundance analysis based on high dispersion and high signal-to-noise ratio Keck spectra of a very highly microlensed Galactic bulge dwarf, OGLE-2007-BLG-349S, with Te…
The B and Be Star Population of NGC 3766
M. Virginia McSwain, Wenjin Huang, Douglas R. Gies +2
We present multiple epochs of H-alpha spectroscopy for 47 members of the open cluster NGC 3766 to investigate the long term variability of its Be stars. Sixteen of the stars in thi…
Stellar Rotation in Young Clusters. II. Evolution of Stellar Rotation and Surface Helium Abundance
W. Huang, D. R. Gies
We derive the effective temperatures and gravities of 461 OB stars in 19 young clusters by fitting the H-gamma profile in their spectra. We use synthetic model profiles for rotatin…