The Kinematics of the Ultra-faint Milky Way Satellites: Solving the Missing Satellite Problem

@article{Simon2007TheKO,
  title={The Kinematics of the Ultra-faint Milky Way Satellites: Solving the Missing Satellite Problem},
  author={J. Simon and M. Geha},
  journal={The Astrophysical Journal},
  year={2007},
  volume={670},
  pages={313-331}
}
We present Keck DEIMOS spectroscopy of stars in eight of the newly discovered ultra-faint dwarf galaxies around the Milky Way. We measure the velocity dispersions of Canes Venatici I, Canes Venatici II, Coma Berenices, Hercules, Leo IV, Leo T, Ursa Major I, and Ursa Major II from the velocities of 18-214 stars in each galaxy and find dispersions ranging from 3.3 to 7.6 km s^(-1). The six galaxies with absolute magnitudes M_V < -4 are highly dark matter dominated, with mass-to-light ratios… Expand
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