{
  "id": "2403.00078",
  "version": "v1",
  "published": "2024-02-29T19:10:43.000Z",
  "updated": "2024-02-29T19:10:43.000Z",
  "title": "The Physical Properties of Changing-look Blazars",
  "authors": [
    "Shi-Ju Kang",
    "Bing Lyu",
    "Qingwen Wu",
    "Yong-Gang Zheng",
    "Junhui Fan"
  ],
  "comment": "Published in ApJ. 8 pages, 3 figures, 1 table",
  "doi": "10.3847/1538-4357/ad0fdf",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "Changing-look active galactic nuclei (AGNs) are a special class of AGNs that change their spectral type from type 1 to type 2 or vice versa. In recent years, a number of changing-look blazars (CLBs) were also reported, which transition between flat-spectrum radio quasars and BL Lacs. The physical properties of CLBs are still unclear. Using the $mclust$ R package for Gaussian Mixture Modeling, we performed a clustering analysis for a sample of 105 CLBs selected from the literature. Three kinds of analysis found that CLBs lie in between the parameter distributions of FSRQs and BL Lacs: (i) univariate analysis; (ii) bivariate analysis; and (iii) multivariate analysis, carried out with a dimension reduction approach of the physical properties of the three types of blazars. Our results suggest that CLBs belong to a transition type between FSRQs and BL Lacs, which may be regulated by the change of accretion process and may be similar to other changing-look AGNs.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2024-02-29T19:10:43.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "physical properties",
      "changing-look blazars",
      "bl lacs",
      "dimension reduction approach",
      "flat-spectrum radio quasars"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 8,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}