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- Title
HST Proper Motions of Distant Globular Clusters: Constraining the Formation & Mass of the Milky Way.
- Authors
Sohn, S. Tony; van der Marel, Roeland P.; Deason, Alis; Bellini, Andrea; Besla, Gurtina; Watkins, Laura; Recio-Blanco, A.; de Laverny, P.; Brown, A.G.A.; Prusti, T.
- Abstract
Proper motions (PMs) are required to calculate accurate orbits of globular clusters (GCs) in the Milky Way (MW) halo. We present our HST program to create a PM database for 20 GCs at distances of RGC = 10–100 kpc. Targets are discussed along with PM measurement methods. We also describe how our PM results can be used for Gaia as an external check, and discuss the synergy between HST and Gaia as astrometric instruments in the coming years.
- Publication
Proceedings of the International Astronomical Union, 2017, Vol 12, Issue S330, p261
- ISSN
1743-9213
- Publication type
Article
- DOI
10.1017/S1743921317006056