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Discovery of Ultra-Compact Dwarf Galaxies in the Virgo Cluster
J. B. Jones, M. J. Drinkwater, R. Jurek +7
We have discovered nine ultra-compact dwarf galaxies (UCDs) in the Virgo Cluster, extending samples of these objects outside the Fornax Cluster. Using the 2dF multi-fiber spectrogr…
SDSS J0246-0825: A New Gravitationally Lensed Quasar from the Sloan Digital Sky Survey
Naohisa Inada, Scott Burles, Michael D. Gregg +14
We report the discovery of a new two-image gravitationally lensed quasar, SDSS J024634.11-082536.2 (SDSS J0246-0825). This object was selected as a lensed quasar candidate from the…
Binary Quasars in the Sloan Digital Sky Survey: Evidence for Excess Clustering on Small Scales
Joseph F. Hennawi, Michael A. Strauss, Masamune Oguri +16
We present a sample of 218 new quasar pairs with proper transverse separations R_prop < 1 Mpc/h over the redshift range 0.5 < z < 3.0, discovered from an extensive follow up campai…
The Origin of UCDs in the Virgo Cluster
E. A. Evstigneeva, M. D. Gregg, M. J. Drinkwater
We present the internal velocity dispersions and spectral line indices for six Virgo ultra-compact dwarf (UCD) galaxies obtained from spectroscopy with the Keck II 10-m telescope.…
A Comparison of surface brightness profiles for ultra-compact dwarfs and dwarf elliptical nuclei: implications for the `threshing' scenario
R. De Propris, S. Phillipps, M. Drinkwater +4
Using imaging from the Hubble Space Telescope, we derive surface brightness profiles for ultra-compact dwarfs in the Fornax cluster and for the nuclei of dwarf elliptical galaxies…
Chandra Observations of 12 Luminous Red Quasars
Tanya Urrutia, Mark Lacy, Michael D. Gregg +1
We present results of a study of 12 dust-reddened quasars with 0.4 < z < 2.65 and reddenings in the range 0.15 < E(B-V) < 1.7. We obtained ACIS-S X-ray spectra of these quasars, es…