• DOI:10.3847/1538-4357/ab089f
Corpus ID: 85463973

Evidence for an Intermediate-Mass Milky Way from Gaia DR2 Halo Globular Cluster Motions

@article{Watkins2018EvidenceFA,
  title={Evidence for an Intermediate-Mass Milky Way from Gaia DR2 Halo Globular Cluster Motions},
  author={L. L. Watkins and R. Marel and S. Sohn and N. W. E. STScI and Jhu and Cambridge},
  journal={arXiv: Astrophysics of Galaxies},
  year={2018}
}

L. L. Watkins, R. Marel, +3 authors Cambridge

Published 2018

Physics

arXiv: Astrophysics of Galaxies

We estimate the mass of the Milky Way (MW) within 21.1 kpc using the kinematics of halo globular clusters (GCs) determined by Gaia. The second Gaia data release (DR2) contained a catalogue of absolute proper motions (PMs) for a set of Galactic GCs and satellite galaxies measured using Gaia DR2 data. We select from the catalogue only halo GCs, identifying a total of 34 GCs spanning $2.0 < r < 21.1$ kpc, and use their 3D kinematics to estimate the anisotropy over this range to be $\beta = 0.46… CONTINUE READING

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