The Distribution of Ultra-diffuse and Ultra-compact Galaxies in the Frontier Fields

  title={The Distribution of Ultra-diffuse and Ultra-compact Galaxies in the Frontier Fields},
  author={Steven R. Janssens and Roberto G. Abraham and Jean P. Brodie and Duncan A. Forbes and Aaron J. Romanowsky},
  journal={The Astrophysical Journal},
Large low-surface-brightness galaxies have recently been found to be abundant in nearby galaxy clusters. In this paper, we investigate these ultra-diffuse galaxies (UDGs) in the six Hubble Frontier Fields galaxy clusters: A2744, MACS J0416.1−2403, MACS J0717.5+3745, MACS J1149.5+2223, AS1063, and A370. These are the most massive (1–3 × 1015 M⊙) and distant (0.308 < z < 0.545) systems in which this class of galaxy has yet been discovered. We estimate that the clusters host of the order of ∼200… 

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