Brightest cluster galaxies are statistically special from <i>z</i> = 0.3 to <i>z</i> = 1

DOI PDF PDF 参考文献97件
  • Roohi Dalal
    Department of Astrophysical Sciences, Princeton University , Peyton Hall, Princeton, NJ 08544, USA
  • Michael A Strauss
    Department of Astrophysical Sciences, Princeton University , Peyton Hall, Princeton, NJ 08544, USA
  • Tomomi Sunayama
    Division of Particle and Astrophysical Science, Graduate School of Science, Nagoya University , Nagoya 464-8602, Japan
  • Masamune Oguri
    Research Center for the Early Universe, University of Tokyo , Tokyo 113-0033, Japan
  • Yen-Ting Lin
    Institute of Astronomy and Astrophysics, Academia Sinica , Taipei 10617, Taiwan
  • Song Huang
    Department of Astrophysical Sciences, Princeton University , Peyton Hall, Princeton, NJ 08544, USA
  • Youngsoo Park
    Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU, WPI), University of Tokyo , Chiba 277-8582, Japan
  • Masahiro Takada
    Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU, WPI), University of Tokyo , Chiba 277-8582, Japan

説明

<jats:title>ABSTRACT</jats:title> <jats:p>We study brightest cluster galaxies (BCGs) in ∼5000 galaxy clusters from the Hyper Suprime-Cam (HSC) Subaru Strategic Program. The sample is selected over an area of 830 deg2 and is uniformly distributed in redshift over the range of z = 0.3−1.0. The clusters have stellar masses in the range of 1011.8−1012.9M⊙. We compare the stellar mass of the BCGs in each cluster to what we would expect if their masses were drawn from the mass distribution of the other member galaxies of the clusters. The BCGs are found to be ‘special’, in the sense that they are not consistent with being a statistical extreme of the mass distribution of other cluster galaxies. This result is robust over the full range of cluster stellar masses and redshifts in the sample, indicating that BCGs are special up to a redshift of z = 1.0. However, BCGs with a large separation from the centre of the cluster are found to be consistent with being statistical extremes of the cluster member mass distribution. We discuss the implications of these findings for BCG formation scenarios.</jats:p>

収録刊行物

参考文献 (97)*注記

もっと見る

関連プロジェクト

もっと見る

問題の指摘

ページトップへ