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Cambridge University Press (CUP), Proceedings of the International Astronomical Union, S330(12), p. 261-262, 2017

DOI: 10.1017/s1743921317006056

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HST Proper Motions of Distant Globular Clusters: Constraining the Formation & Mass of the Milky Way

Journal article published in 2017 by S. Tony Sohn ORCID, Roeland P. van der Marel ORCID, Alis Deason, Andrea Bellini, Gurtina Besla, Laura Watkins ORCID
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

AbstractProper 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.

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