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The Magellanic Stream to Halo Interface: Processes that shape our nearest gaseous Halo Stream
Lou Nigra, Snezana Stanimirovic, J. S. Gallagher +3
Understanding the hydrodynamical processes and conditions at the interface between the Magellanic Stream (MS) and the Galactic halo is critical to understanding the MS and by exten…
Kinematics and Metallicities in the Bootes III Stellar Overdensity: a Disrupted Dwarf Galaxy?
Jeffrey L. Carlin, Carl J. Grillmair, Ricardo R. Munoz +2
We report the results of a spectroscopic study of the Bootes III (BooIII) stellar overdensity carried out with the Hectospec multifiber spectrograph on the MMT telescope. Radial ve…
Proper Motions in Kapteyn Selected Area 103: A Preliminary Orbit for the Virgo Stellar Stream
Dana I. Casetti-Dinescu, Terrence M. Girard, Steven R. Majewski +5
We present absolute proper motions in Kapteyn Selected Area (SA) 103. This field is located 7 degrees west of the center of the Virgo Stellar Stream (VSS, Duffau et al. 2006), and…
Probing the Galactic Potential with Next-Generation Observations of Disk Stars
T. Sumi, K. V. Johnston, S. Tremaine +2
Near-future surveys promise a dramatic improvement in the number and precision of astrometric, photometric and spectroscopic measurements of stars in the Milky Way's disk. We exami…
SEGUE-2 and APOGEE: Revealing the History of the Milky Way
Constance Rockosi, Timothy C. Beers, Steven Majewski +3
The history of the Milky Way is encoded in the spatial distributions, kinematics, and chemical enrichment patterns of its resolved stellar populations. SEGUE-2 and APOGEE, two of t…
The Role of Dwarf Galaxies in Building Large Stellar Halos
Evan N. Kirby, Puragra Guhathakurta, James S. Bullock +10
The hierarchical theory of galaxy formation rests on the idea that smaller galactic structures merge to form the galaxies that we see today. The past decade has provided remarkable…