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WIYN Open Cluster Study. XVII. Astrometry and Membership to V=21 in NGC 188
I. Platais, V. Kozhurina-Platais, R. D. Mathieu +2
We present techniques for obtaining presision astrometry using old photographic plates from assorted large-aperture reflectors in combination with recent CCD Mosaic Imager frames.…
Local Surface Density of the Galactic Disk from a 3-D Stellar Velocity Sample
V. I. Korchagin, T. M. Girard, T. V. Borkova +2
We have re-estimated the surface density of the Galactic disk in the solar neighborhood within 0.4 kpc of the Sun using parallaxes and proper motions of a kinematically and s…
Central Proper-Motion Kinematics of NGC 6752
G. A. Drukier, C. D. Bailyn, W. F. Van Altena +1
We present proper motions derived from WFPC2 imaging for stars in the core of the peculiar globular cluster NGC 6752. The central velocity dispersion in both components of the prop…