{
  "id": "1408.6842",
  "version": "v1",
  "published": "2014-08-28T20:00:08.000Z",
  "updated": "2014-08-28T20:00:08.000Z",
  "title": "The Illustris simulation: Evolving population of black holes across cosmic time",
  "authors": [
    "Debora Sijacki",
    "Mark Vogelsberger",
    "Shy Genel",
    "Volker Springel",
    "Paul Torrey",
    "Greg Snyder",
    "Dylan Nelson",
    "Lars Hernquist"
  ],
  "comment": "22 pages, 15 figures. MNRAS submitted. The Illustris website can be found at http://www.illustris-project.org/",
  "categories": [
    "astro-ph.GA",
    "astro-ph.CO"
  ],
  "abstract": "We study the properties of black holes and their host galaxies across cosmic time in the Illustris simulation. Illustris is a large scale cosmological hydrodynamical simulation which resolves a (106.5 Mpc)^3 volume with more than 12 billion resolution elements and includes state-of-the-art physical models relevant for galaxy formation. We find that the black hole mass density for redshifts z = 0 - 5 and the black hole mass function at z = 0 predicted by Illustris are in excellent agreement with the most recent observational constraints. We show that the bolometric and hard X-ray luminosity functions of AGN at z = 0 reproduce observational data very well over the full dynamic range probed. This requires radiative efficiencies to be on average low, epsilon_r <= 0.1, unless the bolometric corrections are largely underestimated. Cosmic downsizing of the AGN population is in broad agreement with the findings from X-ray surveys, but we caution that obscuration effects may introduce systematic biases in the flux-limited samples at the faint end. We also study black hole - host galaxy scaling relations as a function of galaxy morphology, colour and specific star formation rate. We find that black holes and galaxies co-evolve at the massive end, but for low mass, blue and star-forming galaxies there is no tight relation with either their central black hole masses or the nuclear AGN activity.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2014-08-28T20:00:08.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "illustris simulation",
      "cosmic time",
      "evolving population",
      "scale cosmological hydrodynamical simulation",
      "black hole mass density"
    ],
    "publication": {
      "doi": "10.1093/mnras/stv1340",
      "journal": "Monthly Notices of the Royal Astronomical Society",
      "year": 2015,
      "month": "Sep",
      "volume": 452,
      "number": 1,
      "pages": 575
    },
    "note": {
      "typesetting": "TeX",
      "pages": 22,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1312946,
      "adsabs": "2015MNRAS.452..575S"
    }
  }
}