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16 papers · 2 filters
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…
Dust Properties and Star-Formation Rates in Star-Forming Dwarf Galaxies
J. L. Rosenberg, Yanling Wu, Emeric Le Floc'h +5
We have used the Spitzer Space Telescope to study the dust properties of a sample of star-forming dwarf galaxies. The differences in the mid-infrared spectral energy distributions…
An X-ray emitting black hole in a globular cluster
Thomas J. Maccarone, Gilles Bergond, Arunav Kundu +4
We present optical and X-ray data for the first object showing strong evidence for being a black hole in a globular cluster. We show the initial X-ray light curve and X-ray spectru…
The Stellar Content of Galaxy Halos: A Comparison between LambdaCDM Models and Observations of M31
Andreea S. Font, Kathryn V. Johnston, Annette M. N. Ferguson +4
Recent observations have revealed that high surface-brightness, metal-rich debris is present over large regions of the Andromeda (M31) stellar halo. We use a set of numerical model…
[OIII] 5007 Emission from the Black-Hole X-ray Binary in a NGC 4472 Globular Cluster
Stephen E. Zepf, Thomas J. Maccarone, Gilles Bergond +3
We present the discovery of [OIII] 5007 emission associated with the black hole X-ray binary recently identified in a globular cluster in the Virgo elliptical galaxy NGC 4472. This…
The Orbital Period of the Wolf-Rayet Binary IC 10 X-1; Dynamic Evidence that the Compact Object is a Black Hole
A. H. Prestwich, R. Kilgard, P. A. Crowther +6
IC 10 X-1 is a bright (Lx=10^38 ergs/s) variable X-ray source in the local group starburst galaxy IC 10. The most plausible optical counterpart is a luminous Wolf-Rayet star, makin…