{
  "id": "1810.11240",
  "version": "v1",
  "published": "2018-10-26T09:55:39.000Z",
  "updated": "2018-10-26T09:55:39.000Z",
  "title": "The host galaxies of luminous type 2 AGN at $z \\sim$0.3-0.4",
  "authors": [
    "J. J. Urbano-Mayorgas",
    "M. Villar Martín",
    "F. Buitrago",
    "J. Piqueras López",
    "B. Rodríguez del Pino",
    "A. M. Koekemoer",
    "M. Huertas-Company",
    "R. Domínguez-Tenreiro",
    "F. J. Carrera",
    "C. Tadhunter"
  ],
  "comment": "23 pages, 6 figures. Accepted for publication in MNRAS",
  "doi": "10.1093/mnras/sty2910",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "We study the morphological and structural properties of the host galaxies associated with 57 optically-selected luminous type 2 AGN at $z\\sim$0.3-0.4: 16 high-luminosity Seyfert 2 (HLSy2, 8.0$\\le$log($L_{\\rm [OIII]}/L_{\\odot})<$8.3) and 41 obscured quasars (QSO2, log($L_{\\rm [OIII]}/L_{\\odot})\\ge$8.3). With this work, the total number of QSO2 at $z<1$ with parametrized galaxies increases from $\\sim$35 to 76. Our analysis is based on HST WFPC2 and ACS images that we fit with {\\sc GALFIT}. HLSy2 and QSO2 show a wide diversity of galaxy hosts. The main difference lies in the higher incidence of highly-disturbed systems among QSO2. This is consistent with a scenario in which galaxy interactions are the dominant mechanism triggering nuclear activity at the highest AGN power. There is a strong dependence of galaxy properties with AGN power (assuming $L_ {\\rm [OIII]}$ is an adequate proxy). The relative contribution of the spheroidal component to the total galaxy light (B/T) increases with $L_ {\\rm [OIII]}$. While systems dominated by the spheoridal component spread across the total range of $L_ {\\rm [OIII]}$, most disk-dominated galaxies concentrate at log($L_{\\rm [OIII]}/L_{\\odot})<$8.6. This is expected if more powerful AGN are powered by more massive black holes which are hosted by more massive bulges or spheroids. The average galaxy sizes ($\\langle r_{\\rm e} \\rangle$) are 5.0$\\pm$1.5 kpc for HLSy2 and 3.9$\\pm$0.6 kpc for HLSy2 and QSO2 respectively. These are significantly smaller than those found for QSO1 and narrow line radio galaxies at similar $z$. We put the results of our work in context of related studies of AGN with quasar-like luminosities.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-10-26T09:55:39.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "host galaxies",
      "luminous type",
      "narrow line radio galaxies",
      "dominant mechanism triggering nuclear activity",
      "highest agn power"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 23,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}