{
  "id": "1709.07230",
  "version": "v1",
  "published": "2017-09-21T09:30:15.000Z",
  "updated": "2017-09-21T09:30:15.000Z",
  "title": "A census of radio-selected AGN on the COSMOS field and of their FIR properties",
  "authors": [
    "Manuela Magliocchetti",
    "Paola Popesso",
    "Marcella Brusa",
    "Mara Salvato"
  ],
  "comment": "15 pages, 17 figures, to appear in MNRAS",
  "categories": [
    "astro-ph.GA",
    "astro-ph.CO"
  ],
  "abstract": "We use the new catalogue by Laigle et al. (2016) to provide a full census of VLA-COSMOS radio sources. We identify 90% of such sources and sub-divide them into AGN and star-forming galaxies on the basis of their radio luminosity. The AGN sample is COMPLETE with respect to radio selection at all z<3.5. Out of 704 AGN, 272 have a counterpart in the Herschel maps. By exploiting the better statistics of the new sample, we confirm the results of Magliocchetti et al. (2014): the probability for a radio-selected AGN to be detected at FIR wavelengths is both a function of radio luminosity and redshift, whereby powerful sources are more likely FIR emitters at earlier epochs. Such an emission is due to star-forming processes within the host galaxy. FIR emitters and non-FIR emitters only differentiate in the z<1 universe. At higher redshifts they are indistinguishable from each other, as there is no difference between FIR-emitting AGN and star-forming galaxies. Lastly, we focus on radio AGN which show AGN emission at other wavelengths. We find that MIR emission is mainly associated with ongoing star-formation and with sources which are smaller, younger and more radio luminous than the average parent population. X-ray emitters instead preferentially appear in more massive and older galaxies. We can therefore envisage an evolutionary track whereby the first phase of a radio-active AGN and of its host galaxy is associated with MIR emission, while at later stages the source becomes only active at radio wavelengths and possibly also in the X-ray.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2017-09-21T09:30:15.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "radio-selected agn",
      "cosmos field",
      "fir properties",
      "radio luminosity",
      "mir emission"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 15,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}