4 papers
The ACS Survey of Galactic Globular Clusters XI: The Three-Dimensional Orientation of the Sagittarius Dwarf Spheroidal Galaxy and its Globular Clusters
Michael H. Siegel, Steven R. Majewski, David R. Law +13
We use observations from the ACS study of Galactic globular clusters to investigate the spatial distribution of the inner regions of the disrupting Sagittarius dwarf spheroidal gal…
An ACS Survey of Globular Clusters V: Star Catalog for Each Cluster
Jay Anderson, Ata Sarajedini, Luigi R. Bedin +10
The ACS Survey of Globular Clusters has used HST's Wide-Field Channel to obtain uniform imaging of 65 of the nearest globular clusters to provide an extensive homogeneous dataset f…
Starcounts Redivivus. IV. Density Laws Through Photometric Parallaxes
M. H. Siegel, S. R. Majewski, I. N. Reid +1
In an effort to more precisely define the spatial distribution of Galactic field stars, we present an analysis of the photometric parallaxes of 70,000 stars covering nearly 15 squa…
Constraining the History of the Sagittarius Dwarf Galaxy Using Observations of its Tidal Debris
K. V. Johnston, S. R. Majewski, M. H. Siegel +2
We present a comparison of semi-analytic models of the phase-space structure of tidal debris with observations of stars associated with the Sagittarius dwarf galaxy (Sgr). We find…