{
  "id": "2205.12946",
  "version": "v1",
  "published": "2022-05-25T17:51:51.000Z",
  "updated": "2022-05-25T17:51:51.000Z",
  "title": "The Physical Properties of Low-Redshift FeLoBAL Quasars: II. The Rest-Frame Optical Emission Line Properties",
  "authors": [
    "Karen M. Leighly",
    "Hyunseop Choi",
    "Cora DeFrancesco",
    "Julianna Voelker",
    "Donald M. Terndrup",
    "Sarah C. Gallagher",
    "Gordon T. Richards"
  ],
  "comment": "Resubmitted to ApJ after review",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "We report the results of analysis of the Hbeta emission-line region of a sample of thirty low-redshift (z<1) iron low-ionization broad absorption line quasars (FeLoBALQs). Eleven of these objects are newly classified as FeLoBALQs. A matched sample of 132 unabsorbed quasars was analyzed in parallel. The emission lines showed the well known anticorrelation between the [OIII] and FeII emission (Boroson & Green 1992). Using a summary statistic called E1 to quantify this anticorrelation, we found that while the distribution of E1 for the unabsorbed quasars has a single peak, the FeLoBALQs have a bimodal shape in this parameter. Previous studies have shown that the line emission properties of BAL and non-BAL quasars are consistent, and therefore the difference in the Hbeta region emission between FeLoBAL quasars and unabsorbed quasars is a new result. The two populations of FeLoBAL quasars are characterized by low and high bolometric luminosities and Eddington ratios. Some previous studies have suggested that BAL quasars are high accretion-rate objects, and therefore the discovery of the low accretion-rate branch of FeLoBAL quasars was unexpected. We also found that the Hbeta FWHM is systematically broader among the FeLoBALQs compared with the non-BAL quasars implying a higher inclination viewing angle or a dearth of low-velocity line-emitting gas.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2022-05-25T17:51:51.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "rest-frame optical emission line properties",
      "low-redshift felobal quasars",
      "broad absorption line quasars",
      "low-ionization broad absorption line",
      "physical properties"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}