{
  "id": "astro-ph/9403002",
  "version": "v1",
  "published": "1994-03-01T00:36:48.000Z",
  "updated": "1994-03-01T00:36:48.000Z",
  "title": "Boron in the Extreme Pop II Star HD 140283 and the Production of Light Elements in the Early Galaxy",
  "authors": [
    "B. Edvardsson",
    "B. Gustafsson",
    "S. G. Johansson",
    "D. Kiselman",
    "D. L. Lambert",
    "P. E. Nissen",
    "G. Gilmore"
  ],
  "comment": "6 pages, A&A plain TeX, UAO-94-P87",
  "journal": "Astron. Astrophys. 290 (1994) 176",
  "categories": [
    "astro-ph"
  ],
  "abstract": "Using observations of the 2496.7 A B I line with the HST GHRS at a nominal resolution of 90,000, we have found the abundance of boron of HD 140283 to be log epsilon_B (= 12 + log (N_B/N_H)) = 0.34 \\pm 0.20. This result is found when a significant non-LTE effect in the formation of the B I line is taken into account. The resulting N_B/N_Be ratio is about 17 (in the range 9 -- 34), which is in very good agreement with what is expected from spallation by cosmic rays. We conclude that this origin of Be and B in the Early Galaxy is the most probable of recently suggested formation mechanisms. (Submitted to A&A. Postscript figures available via annymous ftp to \"chiron.astro.uu.se\" in directory pub/Preprints/P87)",
  "revisions": [
    {
      "version": "v1",
      "updated": "1994-03-01T00:36:48.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "early galaxy",
      "light elements",
      "extreme pop",
      "star hd",
      "production"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "Plain TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 390410
    }
  }
}