{
  "id": "2205.00520",
  "version": "v1",
  "published": "2022-05-01T17:31:41.000Z",
  "updated": "2022-05-01T17:31:41.000Z",
  "title": "Relationship between Gamma-ray loudness and X-ray spectra of Radio Galaxies",
  "authors": [
    "Taishu Kayanoki",
    "Yasushi Fukazawa"
  ],
  "comment": "23 pages, 7 figures, 4 tables, PASJ accepted (2022/04/27)",
  "journal": "PASJ 2022",
  "categories": [
    "astro-ph.HE",
    "astro-ph.GA"
  ],
  "abstract": "The {\\it Fermi} satellite has detected $\\sim$60 radio galaxies (RGs). In this study, we investigate the difference in the properties of X-ray spectra between GeV-loud RGs and GeV-quiet RGs. Our sample comprises 68 objects: 36 RGs detected with {\\it Fermi} and 32 RGs not detected with gamma rays. We analyzed the X-ray spectra of these 68 objects using data from the {\\it XMM-Newton}, {\\it Chandra}, {\\it NuSTAR}, and {\\it Swift} satellites. Our results show that most GeV-loud RGs do not exhibit significant absorption, while $\\sim$50\\% of the GeV-quiet RGs exhibit significant absorption. This suggests that the jet of GeV-loud RGs is viewed from a small angle, and thus the emission is not easily blocked by the torus. Moreover, we reported that RGs with a heavy absorption are mostly in the X-ray luminosity range of $10^{43}-10^{45}$erg s$^{-1}$; however, few RGs with lower and higher luminosity suffer from heavy absorption. This is the same trend as that of Seyfert galaxies.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2022-05-01T17:31:41.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "x-ray spectra",
      "radio galaxies",
      "gamma-ray loudness",
      "gev-loud rgs",
      "relationship"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 23,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}