{
  "id": "astro-ph/0312246",
  "version": "v1",
  "published": "2003-12-09T20:15:36.000Z",
  "updated": "2003-12-09T20:15:36.000Z",
  "title": "The ionization equilibrium of iron in H II regions",
  "authors": [
    "M. Rodriguez",
    "R. H. Rubin"
  ],
  "comment": "4 pages, 1 figure, extended version of the paper to be published in \"Recycling intergalactic and interstellar matter\", IAU Symposium Series, Vol. 217, 2004, P.-A. Duc, J. Braine and E. Brinks, eds",
  "categories": [
    "astro-ph"
  ],
  "abstract": "We study the ionization equilibrium of Fe using photoionization models that incorporate improved values for the ionization and recombination cross-sections and the charge-exchange rates for the Fe ions. The previously available photoionization models predict concentrations of Fe3+ which are a factor of 3-8 higher than the values inferred from emission lines of [Fe III] and [Fe IV]. Our new models reduce these discrepancies to factors of 2-5. We discuss the possible reasons behind the remaining discrepancies and present an updated ionization correction factor for obtaining the Fe abundance from the Fe++ abundance.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2003-12-09T20:15:36.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "ionization equilibrium",
      "photoionization models predict concentrations",
      "updated ionization correction factor",
      "emission lines",
      "charge-exchange rates"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 635042
    }
  }
}