{
  "id": "1907.10617",
  "version": "v1",
  "published": "2019-07-24T18:00:01.000Z",
  "updated": "2019-07-24T18:00:01.000Z",
  "title": "Host galaxies of high-redshift extremely red and obscured quasars",
  "authors": [
    "Nadia L. Zakamska",
    "Ai-Lei Sun",
    "Michael A. Strauss",
    "Rachael M. Alexandroff",
    "W. N. Brandt",
    "Marco Chiaberge",
    "Jenny E. Greene",
    "Fred Hamann",
    "Guilin Liu",
    "Serena Perrotta",
    "Nicholas P. Ross",
    "Dominika Wylezalek"
  ],
  "comment": "Accepted to MNRAS; 23 pages, including 9 figures and 2 tables",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "We present Hubble Space Telescope 1.4-1.6 micron images of the hosts of ten extremely red quasars (ERQs) and six type 2 quasar candidates at z=2-3. ERQs, whose bolometric luminosities range between 10^47 and 10^48 erg/sec, show spectroscopic signs of powerful ionized winds, whereas type 2 quasar candidates are less luminous and show only mild outflows. After performing careful subtraction of the quasar light, we clearly detect almost all host galaxies. The median rest-frame B-band luminosity of the ERQ hosts in our sample is 10^11.2 L_Sun, or 4 L* at this redshift. Two of the ten hosts of ERQs are in ongoing mergers. The hosts of the type 2 quasar candidates are 0.6 dex less luminous, with 2/6 in likely ongoing mergers. Intriguingly, despite some signs of interaction and presence of low-mass companions, our objects do not show nearly as much major merger activity as do high-redshift radio-loud galaxies and quasars. In the absence of an overt connection to major ongoing gas-rich merger activity, our observations are consistent with a model in which the near-Eddington accretion and strong feedback of ERQs are associated with relatively late stages of mergers resulting in early-type remnants. These results are in some tension with theoretical expectations of galaxy formation models, in which rapid black hole growth occurs within a short time of a major merger. Type 2 quasar candidates are less luminous, so they may instead be powered by internal galactic processes.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-07-24T18:00:01.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "host galaxies",
      "quasar candidates",
      "obscured quasars",
      "high-redshift",
      "rapid black hole growth occurs"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 23,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}