The Uchuu-universe machine data set: galaxies in and around clusters

Han Aung, Daisuke Nagai, Anatoly Klypin, Peter Behroozi, Mohamed H. Abdullah, Tomoaki Ishiyama, Francisco Prada, Enrique Pérez, Javier López Cacheiro, José Ruedas

Research output: Contribution to journalArticlepeer-review


We present the public data release of the Uchuu-UM galaxy catalogues by applying the UNIVERSEMACHINE algorithm to assign galaxies to the dark matter haloes in the Uchuu N-body cosmological simulation. It includes a variety of baryonic properties for all galaxies down to ∼5 × 108 M with haloes in a mass range of 1010 < Mhalo/M < 5 × 1015 up to redshift z = 10. Uchuu-UM includes more than 104 cluster-size haloes in a volume of 8(h−1Gpc)3, reproducing observed stellar mass functions across the redshift range of z = 0−7, galaxy quenched fractions, and clustering statistics at low redshifts. Compared to the previous largest UM catalogue, the Uchuu-UM catalogue includes significantly more massive galaxies hosted by large-mass dark matter haloes. Overall, the number density profile of galaxies in dark matter haloes follows the dark matter profile, with the profile becoming steeper around the splashback radius and flattening at larger radii. The number density profile of galaxies tends to be steeper for larger stellar masses and depends on the colour of galaxies, with red galaxies having steeper slopes at all radii than blue galaxies. The quenched fraction exhibits a strong dependence on the stellar mass and increases towards the inner regions of clusters. The publicly available Uchuu-UM galaxy catalogue presented here can serve to model ongoing and upcoming large galaxy surveys.

Original languageEnglish (US)
Pages (from-to)1648-1656
Number of pages9
JournalMonthly Notices of the Royal Astronomical Society
Issue number2
StatePublished - Feb 1 2023


  • cosmology: theory
  • dark matter
  • galaxies: clusters: general
  • large-scale structure of Universe
  • methods: numerical

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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