{
  "id": "1103.3037",
  "version": "v1",
  "published": "2011-03-15T20:53:56.000Z",
  "updated": "2011-03-15T20:53:56.000Z",
  "title": "An overabundance of oxygen in planetary nebulae of the solar neighborhood",
  "authors": [
    "Mónica Rodríguez",
    "Gloria Delgado-Inglada"
  ],
  "comment": "2 pages, 1 figure, to appear in \"XIII Latin American Regional IAU Meeting\" RevMexAAConfSer",
  "categories": [
    "astro-ph.GA",
    "astro-ph.SR"
  ],
  "abstract": "We study the oxygen abundance in five H II regions and seven planetary nebulae (PNe) located within 2 kpc from the Sun that have available spectra of high quality. Our analysis uses a similar procedure and the same atomic data to derive abundances in all the objects. The results calculated with collisionally excited lines for the H II regions indicate that the local interstellar medium is very homogeneous, with 12+log(O/H)=8.45-8.54. As for the PNe, six out of seven show significantly higher abundances: 12+log(O/H)=8.65-8.80. This overabundance of oxygen in PNe also holds when we consider the abundances implied by recombination lines.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2011-03-15T20:53:56.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "solar neighborhood",
      "overabundance",
      "seven planetary nebulae",
      "local interstellar medium",
      "oxygen abundance"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 2,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 892852,
      "adsabs": "2011RMxAC..40..179R"
    }
  }
}