1 Ocak 2017 Dergi makalesi Açık Erişim

McGraw, S. M.; Brandt, W. N.; Grier, C. J.; Ak, N. Filiz; Hall, P. B.; Schneider, D. P.; Anderson, S. F.; Green, P. J.; Hutchinson, T. A.; Macleod, C. L.; Vivek, M.

JSON

{
  "conceptrecid": "45140", 
  "created": "2021-03-15T21:31:07.834164+00:00", 
  "doi": "10.1093/mnras/stx1063", 
  "files": [
    {
      "bucket": "2fdbafb4-9d6e-48e8-93de-533b380a5646", 
      "checksum": "md5:2de030d82b096b449033e871d7bb5f1f", 
      "key": "bib-1f3f0a8b-97b9-4b40-a180-0d7a1a013bbf.txt", 
      "links": {
        "self": "https://aperta.ulakbim.gov.tr/api/files/2fdbafb4-9d6e-48e8-93de-533b380a5646/bib-1f3f0a8b-97b9-4b40-a180-0d7a1a013bbf.txt"
      }, 
      "size": 329, 
      "type": "txt"
    }
  ], 
  "id": 45141, 
  "links": {
    "badge": "https://aperta.ulakbim.gov.tr/badge/doi/10.1093/mnras/stx1063.svg", 
    "bucket": "https://aperta.ulakbim.gov.tr/api/files/2fdbafb4-9d6e-48e8-93de-533b380a5646", 
    "doi": "https://doi.org/10.1093/mnras/stx1063", 
    "html": "https://aperta.ulakbim.gov.tr/record/45141", 
    "latest": "https://aperta.ulakbim.gov.tr/api/records/45141", 
    "latest_html": "https://aperta.ulakbim.gov.tr/record/45141"
  }, 
  "metadata": {
    "access_right": "open", 
    "access_right_category": "success", 
    "communities": [
      {
        "id": "tubitak-destekli-proje-yayinlari"
      }
    ], 
    "creators": [
      {
        "name": "McGraw, S. M."
      }, 
      {
        "name": "Brandt, W. N."
      }, 
      {
        "name": "Grier, C. J."
      }, 
      {
        "name": "Ak, N. Filiz"
      }, 
      {
        "affiliation": "York Univ, Dept Phys & Astron, 4700 Keele St, Toronto, ON M3J 1P3, Canada", 
        "name": "Hall, P. B."
      }, 
      {
        "name": "Schneider, D. P."
      }, 
      {
        "affiliation": "Univ Washington, Dept Astron, Box 351580, Seattle, WA 98195 USA", 
        "name": "Anderson, S. F."
      }, 
      {
        "affiliation": "Harvard Smithsonian Ctr Astrophys, 60 Garden Sreet, Cambridge, MA 02138 USA", 
        "name": "Green, P. J."
      }, 
      {
        "affiliation": "Univ Utah, Dept Phys & Astron, 115 S 1400 E, Salt Lake City, UT 84112 USA", 
        "name": "Hutchinson, T. A."
      }, 
      {
        "affiliation": "Harvard Smithsonian Ctr Astrophys, 60 Garden Sreet, Cambridge, MA 02138 USA", 
        "name": "Macleod, C. L."
      }, 
      {
        "affiliation": "Univ Utah, Dept Phys & Astron, 115 S 1400 E, Salt Lake City, UT 84112 USA", 
        "name": "Vivek, M."
      }
    ], 
    "description": "We investigate broad absorption line (BAL) disappearance and emergence using a 470 BAL-quasar sample over <= 0.10-5.25 rest-frame years with at least three spectroscopic epochs for each quasar from the Sloan Digital Sky Survey. We identify 14 disappearing BALs over <= 1.73-4.62 rest-frame years and 18 emerging BALs over <= 1.46-3.66 rest-frame years associated with the C IV lambda 1548,1550 and/or Si IV lambda lambda 1393,1402 doublets, and report on their variability behaviour. BAL quasars in our data set exhibit disappearing/emerging C IV BALs at a rate of 2.3(-0.7)(+0.9) and 3.0(-0.8)(+1.0) per cent, respectively, and the frequency for BAL to non-BAL quasar transitions is 1.7(-0.6)(+0.8) per cent. We detect four re-emerging BALs over <= 3.88 rest-frame years on average and three re-disappearing BALs over <= 4.15 rest-frame years on average, the first reported cases of these types. We infer BAL lifetimes along the line of sight to be nominally less than or similar to 100-1000 yr using disappearing C IV BALs in our sample. Interpretations of (re-) emerging and (re-) disappearing BALs reveal evidence that collectively supports both transverse-motion and ionization-change scenarios to explain BAL variations. We constrain a nominal C IV/Si IV BAL-outflow location of less than or similar to 100 pc from the central source and a radial size of greater than or similar to 1x 10(-7) pc (0.02 au) using the ionization-change scenario, and constrain a nominal outflow location of less than or similar to 0.5 pc and a transverse size of similar to 0.01 pc using the transverse-motion scenario. Our findings are consistent with previous work, and provide evidence in support of BALs tracing compact flow geometries with small filling factors.", 
    "doi": "10.1093/mnras/stx1063", 
    "has_grant": false, 
    "journal": {
      "issue": "3", 
      "pages": "3163-3184", 
      "title": "MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY", 
      "volume": "469"
    }, 
    "license": {
      "id": "cc-by"
    }, 
    "publication_date": "2017-01-01", 
    "relations": {
      "version": [
        {
          "count": 1, 
          "index": 0, 
          "is_last": true, 
          "last_child": {
            "pid_type": "recid", 
            "pid_value": "45141"
          }, 
          "parent": {
            "pid_type": "recid", 
            "pid_value": "45140"
          }
        }
      ]
    }, 
    "resource_type": {
      "subtype": "article", 
      "title": "Dergi makalesi", 
      "type": "publication"
    }, 
    "title": "Broad absorption line disappearance and emergence using multiple-epoch spectroscopy from the Sloan Digital Sky Survey"
  }, 
  "owners": [
    1
  ], 
  "revision": 1, 
  "stats": {
    "downloads": 9.0, 
    "unique_downloads": 9.0, 
    "unique_views": 46.0, 
    "version_downloads": 9.0, 
    "version_unique_downloads": 9.0, 
    "version_unique_views": 48.0, 
    "version_views": 49.0, 
    "version_volume": 2961.0, 
    "views": 47.0, 
    "volume": 2961.0
  }, 
  "updated": "2021-03-15T21:31:07.878774+00:00"
}