APPROXIMATELY A THOUSAND ULTRA-DIFFUSE GALAXIES IN THE COMA CLUSTER

@article{Koda2015APPROXIMATELYAT,
  title={APPROXIMATELY A THOUSAND ULTRA-DIFFUSE GALAXIES IN THE COMA CLUSTER},
  author={Jin Koda and Masafumi Yagi and Hitomi Yamanoi and Yutaka Komiyama},
  journal={The Astrophysical Journal Letters},
  year={2015},
  volume={807}
}
We report the discovery of 854 ultra-diffuse galaxies (UDGs) in the Coma cluster using deep R band images, with partial B, i, and Hα band coverage, obtained with the Subaru telescope. Many of them (332) are Milky Way (MW) sized with very large effective radii of r e > 1.5 kpc ?> . This study was motivated by the recent discovery of 47 UDGs by Dokkum et al.; our discovery suggests > 1000 ?> UDGs after accounting for the smaller Subaru field ( 4.1 degree 2 ?> ; about one-half of Dragonfly). The… 

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