7 papers · 1 filter
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…
The M31 Dwarf Spheroidal Companion And V: g', r', and i' Imaging with GMOS on Gemini North
T. J. Davidge, G. S. Da Costa, I. Jorgensen +1
g', r', and i' images obtained with the Gemini Multi-Object Spectrograph (GMOS) on Gemini North are used to investigate the metallicity and stellar content of the M31 dwarf spheroi…
Surface Photometry of Star Clusters in the Dwarf Elliptical Galaxies NGC 185 and NGC 205
Sang Chul Kim, Myung Gyoon Lee, Doug Geisler +3
We present the surface photometry of star clusters in the nearby dwarf elliptical galaxies NGC 185 and NGC 205, obtained from deep HST WFPC2 F555W (V) and F814W (I) images. We have…
Chemical Abundances in the Carina dSph Galaxy
Tammy A. Smecker-Hane, Georgi I. Mandushev, James E. Hesser +3
We report on the chemical abundances of stars in the Carina dwarf spheroidal galaxy (dSph) derived from low-resolution spectra. We have determined values of [Fe/H] for 52 stars fro…
The Dwarf Spheroidal Galaxies in the Galactic Halo
G. S. Da Costa
In the first part of this contribution the observed velocity dispersions in Galactic halo dwarf spheroidal (dSph) galaxies are reviewed, and the consequences for dark matter conten…
The Andromeda Dwarf Spheroidal Galaxies
Taft E. Armandroff, Gary S. Da Costa
Our current knowledge of M31's dwarf spheroidal companions is reviewed. Two topics of recent interest constitute the bulk of this review. First, color-magnitude diagrams reaching b…