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Galactic Halo substructure in the Sloan Digital Sky Survey: the ancient tidal stream from the Sagittarius dwarf galaxy
Rodrigo Ibata, Michael Irwin, Geraint Lewis +1
Two studies have recently reported the discovery of pronounced Halo substructure in the Sloan Digital Sky Survey (SDSS) commissioning data. Here we show that this Halo substructure…
Great Circle tidal streams: evidence for a nearly spherical massive dark halo around the Milky Way
Rodrigo Ibata, Geraint F. Lewis, Michael Irwin +2
An all high-latitude sky survey for cool carbon giant stars in the Galactic halo has revealed 75 such stars, of which the majority are new detections. Of these, more than half are…
Magellanic Cloud Periphery Carbon Stars IV: The SMC
William Kunkel, Serge Demers, M. J. Irwin
The kinematics of 150 carbon stars observed at moderate dispersion on the periphery of the Small Magellanic Cloud are compared with the motions of neutral hydrogen and early type s…
Discovery of high proper motion ancient white dwarfs: nearby massive compact halo objects?
Rodrigo Ibata, Michael Irwin, Olivier Bienayme +2
We present the discovery and spectroscopic identification of two very high proper motion ancient white dwarf stars, found in a systematic proper motion survey. Their kinematics and…