{
  "id": "2111.06141",
  "version": "v1",
  "published": "2021-11-11T10:50:48.000Z",
  "updated": "2021-11-11T10:50:48.000Z",
  "title": "The relationship between FR0 radio galaxies and GPS sources",
  "authors": [
    "A. Mikhailov",
    "Yu. Sotnikova"
  ],
  "comment": "4 pages, 1 figure, 6th CSS/GPS sources workshop proceedings, held in May 10-14, 2021 in Torun, Poland. First published: 03 November 2021 in Astronomische Nachrichten",
  "doi": "10.1002/asna.20210050",
  "categories": [
    "astro-ph.GA",
    "astro-ph.HE"
  ],
  "abstract": "We present the results of our study of the relationship between FR0 radio galaxies and GPS sources. Quasi-simultaneous radio spectra of 34 FR0s were obtained at 2.25-22.3 GHz with the radio telescope RATAN-600 in 2020-2021 during 2-6 epochs. Most FR0s have flat radio spectra, but we found many spectra with a peaked shape. Due to this fact and the compact nature of FR0s, we suggest their possible relationship with CSS/GPS radio sources. We analyzed broadband radio spectra of the 34 FR0s using the RATAN-600 measurements and available literature data. There are 14 FR0 objects which can be CSS/GPS radio source candidates. Most FR0s have broader radio spectra than those of genuine GPS sources, with FWHM > 2 like in blazars. Most spectral indices at the frequencies below and above the peak do not correspond to the values typical of canonical GPS sources. We classified 3 FR0s as low-power GPS sources according to the canonical criteria. The key issue is the variability properties of FR0s. Some FR0s demonstrate a variability level of up to 25 % on a time scale of one year according to the RATAN-600 measurements. The flare phenomena in FR0 objects can imply a relationship between them and blazars.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2021-11-11T10:50:48.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "fr0 radio galaxies",
      "relationship",
      "css/gps radio source candidates",
      "fr0 objects",
      "flat radio spectra"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}