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S.C. Chapman (Caltech), R. Ibata (Strasbourg), G. Lewis (U.Sydney), A. Ferguson (U.Edinburgh), M. Irwin (Cambridge), N. Tanvir (Herfortshire), N. Martin (Strasbourg), A. McConnachie (U.Victoria)
We present our ongoing radial velocity and metallicity survey of the halo and the inner/outer disk interface in the M31 galaxy, using Keck/DEIMOS. We highlight new detections of the extended disk, the rotation curve out to 70kpc radius from stellar kinematics, the underlying halo component, and several new kinematic substructures.
This work has been supported by NASA.
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Bulletin of the American Astronomical Society, 37 #4
© 2005. The American Astronomical Soceity.