The Chemical Evolution of the Draco Dwarf Spheroidal Galaxy (2009)
Cohen, Judith G., Huang, Wenjin
We present an abundance analysis based on high-resolution spectra of eight stars selected to span the full range in metallicity in the Draco dwarf spheroidal (dSph) galaxy. We find that [Fe/H] for...
HD 69686: A Mysterious High Velocity B Star (2009)
Huang, Wenjin, Gies, Douglas R., McSwain, M. Virginia
We report on the discovery of a high velocity B star, HD 69686. We estimate its space velocity, distance, surface temperature, gravity, and age. With these data, we are able to reconstruct the...
Cohen, Judith G., Thompson, Ian B., Sumi, Takahiro, Bond, Ian, Gould, Andrew, Johnson, Jennifer A., ...
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-sequence turnoff with...
The Chemical Evolution of the Draco Dwarf Spheroidal Galaxy (2009)
Cohen, Judith G., Huang, Wenjin
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 the sample stars...
Variability of Be Stars in Southern Open Clusters (2009)
McSwain, M. Virginia, Huang, Wenjin, Gies, Douglas R.
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 explore whether...
Cohen, Judith G., Thompson, Ian B., Sumi, Takahiro, Bond, Ian, Gould, Andrew, Johnson, Jennifer A., ...
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 sequence turnoff with...
Stellar Rotation in Field and Cluster B-Stars (2008)
Huang, Wenjin, Gies, Douglas R.
We present the results of a spectroscopic investigation of 108 nearby field B-stars. We derive their key stellar parameters, $V \sin i$, $T_{\rm eff}$, $\log g$, and $\log g_{\rm polar}$, using the...
Clues to the Metallicity Distribution in the Galactic Bulge: Abundances in OGLE-2007_BLG-349S (2008)
Cohen, Judith G., Huang, Wenjin, Udalski, A., Gould, Andrew, Johnson, Jennifer
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 Teff ~ 5400 K. The...
The B and Be star population of NGC 3766 (2008)
McSwain, M. Virginia, Huang, Wenjin, Gies, Douglas R., Grundstrom, Erika D., Townsend, Richard H.D.
We present multiple epochs of Hα 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 this sample are Be stars,...
The B and Be Star Population of NGC 3766 (2007)
McSwain, M. Virginia, Huang, Wenjin, Gies, Douglas R., Grundstrom, Erika D., Townsend, Richard H. D.
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 this sample are Be...
Binary and Multiple O-Type Stars in the Cas OB6 Association (2005)
Hillwig, Todd C., Gies, Douglas R., Bagnuolo, William G., Huang, Wenjin, McSwain, M. Virginia, ...
We present the results of time-resolved spectroscopy of 13 O-type stars in the Cas OB6 stellar association. We conducted a survey for radial velocity variability in search of binary systems, which...
Huang, Wenjin, Gies, Douglas R.
Open clusters offer us the means to study stellar properties in samples with well-defined ages and initial chemical composition. Here we present a survey of projected rotational velocities for a...
Expression and regulation of the neuropeptide Y Y2 receptor in sensory and autonomic ganglia
Zhang, Xu, Shi, Tiejun, Holmberg, Kristina, Landry, Marc, Huang, Wenjin, Xiao, Huasheng, ...
The Y2 subtype of neuropeptide tyrosine (NPY) receptors (Y2R) and some neuropeptides have been studied with in situ hybridization in sensory and autonomic neurons of rat and monkey. Between 10% and...
Expression and regulation of the neuropeptide Y Y2 receptor in sensory and autonomic ganglia
Zhang, Xu, Shi, Tiejun, Holmberg, Kristina, Landry, Marc, Huang, Wenjin, Xiao, Huasheng, ...
The Y2 subtype of neuropeptide tyrosine (NPY) receptors (Y2R) and some neuropeptides have been studied with in situ hybridization in sensory and autonomic neurons of rat and monkey. Between 10% and...