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Modeling The Structure And Dynamics of Dwarf Spheroidal Galaxies with Dark Matter And Tides
Ricardo R. Munoz, Steven R. Majewski, Kathryn V. Johnston
We report the results of N-body simulations of disrupting satellites aimed at exploring whether the observed features of dSphs can be accounted for with simple, mass-follows-light…
Old open clusters in the outer Galactic disk
Giovanni Carraro, Douglas Geisler, Sandro Villanova +2
The outer parts of the Milky Way disk are believed to be one of the main arenas where the accretion of external material in the form of dwarf galaxies and subsequent formation of s…
The ACS Survey of Galactic Globular Clusters: M54 and Young Populations in the Sagittarius Dwarf Spheroidal Galaxy
Michael H. Siegel, Aaron Dotter, Steven R. Majewski +11
We present new Hubble Space Telescope photometry of the massive globular cluster M54 (NGC 6715) and the superposed core of the tidally disrupted Sagittarius (Sgr) dSph galaxy as pa…
Proper Motions in the Galactic Bulge: Plaut's Window
Katherine Vieira, Dana I. Casetti-Dinescu, Rene A. Mendez +6
A proper motion study of a field of 20' x 20' inside Plaut's low extinction window (l,b)=(0 deg,-8 deg), has been completed. Relative proper motions and photographic BV photometry…
The Origin of the Magellanic Stream and Its Leading Arm
David L. Nidever, Steven R. Majewski, W. Butler Burton
We explore the Magellanic Stream (MS) using a Gaussian decomposition of the HI velocity profiles in the Leiden-Argentine-Bonn (LAB) all-sky HI survey. This decomposition exposes th…
Stellar Kinematics in the Complicated Inner Spheroid of M31: Discovery of Substructure Along the Southeastern Minor Axis and its Relationship to the Giant Southern Stream
Karoline M. Gilbert, Mark Fardal, Jasonjot S. Kalirai +9
We present the discovery of a kinematically-cold stellar population along the SE minor axis of the Andromeda galaxy (M31) that is likely the forward continuation of M31's giant sou…