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 Stony Brook and Naoj and Hosei Univ. and Sokendai},
  journal={arXiv: Astrophysics of Galaxies},
  year={2015}
}
We report the discovery of 854 ultra diffuse galaxies (UDGs) in the Coma cluster using deep R band images, with partial B, i, and Halpha band coverage, obtained with the Subaru telescope. Many of them (332) are Milky Way-sized with very large effective radii of r_e>1.5kpc. This study was motivated by the recent discovery of 47 UDGs by van-Dokkum et al. (2015); our discovery suggests >1,000 UDGs after accounting for the smaller Subaru field. The new UDGs show a distribution concentrated around… 

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