{
  "id": "1809.01662",
  "version": "v1",
  "published": "2018-09-05T18:00:02.000Z",
  "updated": "2018-09-05T18:00:02.000Z",
  "title": "Dust emission in an accretion-rate-limited sample of z>6 quasars",
  "authors": [
    "Bram Venemans",
    "Roberto Decarli",
    "Fabian Walter",
    "Eduardo Bañados",
    "Frank Bertoldi",
    "Xiaohui Fan",
    "Emanuele Farina",
    "Chiara Mazzucchelli",
    "Dominik Riechers",
    "Hans-Walter Rix",
    "Ran Wang",
    "Yujin Yang"
  ],
  "comment": "14 pages, 5 figures. Accepted for publication in ApJ",
  "categories": [
    "astro-ph.GA",
    "astro-ph.CO"
  ],
  "abstract": "We present Atacama Large Millimeter Array 1mm observations of the rest-frame far-infrared (FIR) dust continuum in 27 quasars at redshifts 6.0 < z < 6.7. We detect FIR emission at >3sigma in all quasar host galaxies with flux densities at ~1900GHz in the rest-frame of 0.12 < S_rest,1900GHz < 5.9mJy, with a median (mean) flux density of 0.88mJy (1.59mJy). The implied FIR luminosities range from L_FIR = (0.27-13)x10^12 L_sun, with 74% of our quasar hosts having L_FIR > 10^12 L_sun. The estimated dust masses are M_dust = 10^7-10^9 M_sun. If the dust is heated only by star-formation, then the star-formation rates in the quasar host galaxies are between 50 and 2700 M_sun/yr. In the framework of the host galaxy-black hole co-evolution model a correlation between ongoing black hole growth and star-formation in the quasar host galaxy would be expected. However, combined with results from the literature to create a luminosity-limited quasar sample, we do not find a strong correlation between quasar UV luminosity (a proxy for ongoing black hole growth) and FIR luminosity (star-formation in the host galaxy). The absence of such a correlation in our data does not necessarily rule out the co-evolution model, and could be due to a variety of effects (including different timescales for black hole accretion and FIR emission).",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-09-05T18:00:02.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "quasar host galaxy",
      "dust emission",
      "millimeter array 1mm observations",
      "ongoing black hole growth",
      "accretion-rate-limited sample"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 14,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}