The Bulletin of The Korean Astronomical Society (천문학회보)

The Korean Astronomical Society (한국천문학회)
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Large Scale Structures at z~1 in SA22 Field and Environmental Dependence of Galaxy Properties

  • Hyun, Minhee (Korea Astronomy & Space Science Institute (KASI)) ;
  • Im, Myungshin (SNU Astronomy Research Center (SNUARC), Astronomy Program, Dept. of Physics & Astronomy, Seoul National University (SNU)) ;
  • Kim, Jae-Woo (Korea Astronomy & Space Science Institute (KASI)) ;
  • Lee, Seong-Kook (SNU Astronomy Research Center (SNUARC), Astronomy Program, Dept. of Physics & Astronomy, Seoul National University (SNU)) ;
  • Paek, Insu (SNU Astronomy Research Center (SNUARC), Astronomy Program, Dept. of Physics & Astronomy, Seoul National University (SNU))
  • Published : 2021.10.13
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Abstract

We study galaxy evolution with the large-scale environment with confirmed galaxy clusters from multi-object spectroscopy (MOS) observation. The observation was performed with Inamori Magellan Areal Camera and Spectrograph (IMACS) mounted on the 6.5 m Magellan/Baade telescope in Las Campanas Observatory. With the MOS observation, we spectroscopically confirm 34 galaxy clusters, including three galaxy clusters discovered in Kim et al. (2016) and 11 of them have halo mass of > 1014.5 M◉. Among the confirmed clusters, 12 galaxy clusters are part of large-scale structure at z ~ 0.9, and their size stretches to 40 Mpc co-moving scale. In this study, we checked the 'web feeding model,' which postulates that more linked (with their environment) galaxy clusters have less quenched populations by investigating the correlation between properties of confirmed galaxy clusters and the large-scale structure environment. Lastly, we found that galaxy clusters that make up the large-scale structure have larger and widely spread values of total star formation density (ΣSFR/Mhalo) than typical clusters at similar redshifts.

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