{
  "id": "1703.06237",
  "version": "v1",
  "published": "2017-03-18T02:54:17.000Z",
  "updated": "2017-03-18T02:54:17.000Z",
  "title": "The Ratio of the Core to the Extended Emissions in the Comoving Frame for Blazars",
  "authors": [
    "Yun-Tian Li",
    "Shao-Yu Fu",
    "Huan-Jian Feng",
    "Si-Le He",
    "Chao Lin",
    "Jun-Hui Fan",
    "Denise Costantin",
    "Yu-Tao Zhang"
  ],
  "comment": "Accepted by Journal of Astrophysics and Astronomy",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "In a two-component jet model, the emissions are the sum of the core and extended emissions: $S^{\\rm ob}=S_{\\rm core}^{\\rm ob}+S_{\\rm ext}^{\\rm ob}$, with the core emissions, $S_{\\rm core}^{\\rm ob}= f S_{\\rm ext}^{\\rm ob}\\delta^{q}$, being a function of the Doppler factor, $\\delta$, the extended emission, $S_{\\rm ext}^{\\rm ob}$, jet type dependent factor, $q$, and the ratio of the core to the extended emissions in the comoving frame, $f$. The $f$ is an unobservable but important parameter. Following our previous work, we collect 65 blazars with available Doppler factor, $\\delta$, superluminal velocity, $\\beta_{app}$, and core-dominance parameter, $R$, calculate the ratio, $f$, and peform statistical analyses. We find that the ratio, $f$, in BL Lacs is on average larger than that in FSRQs. We suggest that the difference of the ratio $f$ between FSRQs and BL Lacs is one of the possible reasons that cause the difference of other observed properties between them. We also find some significant correlations between $\\log f$ and other parameters, including intrinsic (de-beamed) peak frequency, $\\log \\nu _{\\rm p}^{\\rm in}$, intrinsic polarization, $\\log P^{\\rm in}$, and core-dominance parameter, $\\log R$, for the whole sample. In addition, we show that the ratio, $f$, can be estimated by $R$.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2017-03-18T02:54:17.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "extended emission",
      "comoving frame",
      "core-dominance parameter",
      "bl lacs",
      "doppler factor"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}