Three-dimensional motions in the Sculptor dwarf galaxy as a glimpse of a new era

@article{Massari2018ThreedimensionalMI,
  title={Three-dimensional motions in the Sculptor dwarf galaxy as a glimpse of a new era},
  author={Davide Massari and Maarten A. Breddels and Amina Helmi and Lorenzo Posti and A.G.A. Brown and Eline Tolstoy},
  journal={Nature Astronomy},
  year={2018},
  volume={2},
  pages={156-161}
}
The three-dimensional motions of stars in small galaxies beyond our own are minute, yet they are crucial for understanding the nature of gravity and dark matter1,2. Even for the dwarf galaxy Sculptor—one of the best-studied systems, which is inferred to be strongly dark matter dominated3,4—there are conflicting reports5–7 on its mean motion around the Milky Way, and the three-dimensional internal motions of its stars have never been measured. Here, we present precise proper motions of Sculptor… Expand

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