{
  "id": "0906.1043",
  "version": "v1",
  "published": "2009-06-05T07:20:24.000Z",
  "updated": "2009-06-05T07:20:24.000Z",
  "title": "Detection of heavy-metal lines in the spectrum of the circumstellar envelope of a post-AGB star",
  "authors": [
    "V. G. Klochkova"
  ],
  "comment": "12 pages, 5 figures, 1 table",
  "doi": "10.1134/S1063773709070020",
  "categories": [
    "astro-ph.SR",
    "astro-ph.GA"
  ],
  "abstract": "Splitting of the strongest absorption lines with a lower-level excitation potential $\\chi<$1eV has been detected for the first time in the optical spectra of the post-AGB star V354Lac obtained with a spectral resolution R=60000 at the 6-m telescope BTA. Analysis of the kinematics shows that the short-wavelength component of the split line originates in the star's thick gas-dust envelope. Disregarding the splitting of strong lines when the chemical composition is calculated leads to overestimated excess of s-process elements (Ba, La, Ce, Nd) in the stellar atmosphere. The profiles of strong absorption lines have been found to be variable. The available radial-velocity data suggest the absence of any trend in the velocity field in the atmosphere and circumstellar envelope of V354Lac over 15 years of its observations.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2009-06-05T07:20:24.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "circumstellar envelope",
      "heavy-metal lines",
      "stars thick gas-dust envelope",
      "strong absorption lines",
      "lower-level excitation potential"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "journal": "Astronomy Letters",
      "year": 2009,
      "month": "Jul",
      "volume": 35,
      "number": 7,
      "pages": 457
    },
    "note": {
      "typesetting": "TeX",
      "pages": 12,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 822325,
      "adsabs": "2009AstL...35..457K"
    }
  }
}