Central Proper-Motion Kinematics of NGC 6752

Abstract

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 proper motion is 12 km/s. We discuss the implications of this result as well as the intrinsic difficulties in making such measurements. We also give an alternative correction for the 34-row problem in the WFPC2 CCDs.

25 pages, 7 figures, 1 table included. Accepted for publication in AJ

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• Relativistic Binaries in Globular Clusters
• HST Proper Motions and Stellar Dynamics in the Core of the Globular Cluster 47 Tucanae
• The radial distribution of blue straggler stars and the nature of their progenitors
• The puzzling dynamical status of the core of the globular cluster NGC 6752
• Probing the presence of a single or binary black hole in the globular cluster NGC 6752 with pulsar dynamics
• The Gaia-ESO Survey: Kinematics of seven Galactic globular clusters
• The Global Kinematics of the Globular Cluster M92
• The fingerprint of binary intermediate mass black holes in globular clusters: supra-thermal stars and angular momentum alignment
• Detailed abundances from integrated-light spectroscopy: Milky Way globular clusters
• The puzzling properties of the Helium White Dwarf orbiting the millisecond pulsar PSR J1911-5958A in NGC 6752
• Can high-velocity stars reveal black holes in globular clusters?
• STREGA: STRucture and Evolution of the GAlaxy. I. Survey Overview and First Results
• A ground-based proper motion study of twelve nearby Globular Clusters
• Extrapolating SMBH correlations down the mass scale: the case for IMBHs in globular clusters