489 citations · 5.7k across the 110 of their papers we have counts for
17 papers · 1 filter
Kinematic sub-populations in dwarf spheroidal galaxies
Ugur Ural, Mark I. Wilkinson, Andreas Koch +7
We present new spectroscopic data for twenty six stars in the recently-discovered Canes Venatici I (CVnI) dwarf spheroidal galaxy. We use these data to investigate the recent claim…
The Bulge Radial Velocity Assay (BRAVA): I. Sample Selection and a Rotation Curve
Christian D. Howard, R. Michael Rich, David B. Reitzel +3
Results from the Bulge Radial Velocity Assay (BRAVA) are presented. BRAVA uses M giant stars, selected from the 2MASS catalog to lie within a bound of reddening corrected color and…
What is a galaxy? How Cold is Cold Dark Matter? Recent progress in Near Field Cosmology
Gerard Gilmore, Dan Zucker, Mark Wilkinson +6
There has been a vast recent improvement in photometric and kinematic data for star clusters, Ultra Compact dwarfs, galactic nuclei, and local dSph galaxies, with Subaru contributi…
A new abundance scale for the globular cluster 47 Tuc
Andreas Koch, Andrew McWilliam
We present chemical abundances for O, Na, Mg, Al, Si, Ca, Ti and Fe in eight red giants and one turnoff star in the metal rich globular cluster 47 Tuc, based on spectroscopy with t…
An Accurate Age Determination for the SMC Star Cluster NGC121 with HST/ACS
K. Glatt, J. S. Gallagher, E. K. Grebel +8
As first Paper of a series devoted to study the old stellar population in clusters and fields in the Small Magellanic Cloud, we present deep observations of NGC121 in the F555W and…
Kinematic and Chemical constraints on the formation of M31's inner and outer halo
A. Koch, R. M. Rich, D. B. Reitzel +8
The halo of M31 shows a wealth of substructures that are consistent with satellite accretion. Here we report on kinematic and abundance results from Keck/DEIMOS spectroscopy in the…