{
  "id": "1505.03569",
  "version": "v1",
  "published": "2015-05-13T22:30:21.000Z",
  "updated": "2015-05-13T22:30:21.000Z",
  "title": "The unification of powerful quasars and radio galaxies and their relation to other massive galaxies",
  "authors": [
    "P. Podigachoski",
    "P. D. Barthel",
    "M. Haas",
    "C. Leipski",
    "B. Wilkes"
  ],
  "comment": "12 pages, 2 figures, 1 table. Accepted for publication in ApJ Letters",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "The unification model for powerful radio galaxies and radio-loud quasars postulates that these objects are intrinsically the same but viewed along different angles. Herschel Space Observatory data permit the assessment of that model in the far-infrared spectral window. We analyze photometry from Spitzer and Herschel for the distant 3CR hosts, and find that radio galaxies and quasars have different mid-infrared, but indistinguishable far-infrared colors. Both these properties, the former being orientation dependent and the latter orientation invariant, are in line with expectations from the unification model. Adding powerful radio-quiet active galaxies and typical massive star-forming galaxies to the analysis, we demonstrate that infrared colors not only provide an orientation indicator, but can also distinguish active from star-forming galaxies.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-05-13T22:30:21.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "radio galaxies",
      "massive galaxies",
      "powerful quasars",
      "powerful radio-quiet active galaxies",
      "herschel space observatory data permit"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 12,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}