{
  "id": "1002.4477",
  "version": "v1",
  "published": "2010-02-24T07:07:32.000Z",
  "updated": "2010-02-24T07:07:32.000Z",
  "title": "HD 209621: Abundances of neutron-capture elements",
  "authors": [
    "Aruna Goswami",
    "Wako Aoki"
  ],
  "comment": "16 pages,8 figures. Accepted for publication in MNRAS",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "High resolution spectra obtained from the Subaru Telescope High Dispersion Spectrograph have been used to update the stellar atmospheric parameters and metallicity of the star HD 209621. We have derived a metallicity of [Fe/H] = -1.93 for this star, and have found a large enhancement of carbon and of heavy elements, with respect to iron. Updates on the elemental abundances of four s-process elements (Y, Ce, Pr, Nd) along with the first estimates of abundances for a number of other heavy elements (Sr, Zr, Ba, La, Sm, Eu, Er, Pb) are reported. The stellar atmospheric parameters, the effective temperature, Teff, and the surface gravity, log g (4500 K, 2.0), are determined from LTE analysis using model atmospheres. Estimated [Ba/Eu] = +0.35, places the star in the group of CEMP-(r+s) stars; however, the s-elements abundance pattern seen in HD 209621 is characteristic of CH stars; notably, the 2nd-peak s-process elements are more enhanced than the first peak s-process elements. HD 209621 is also found to show a large enhancement of the 3rd-peak s-process element lead (Pb) with [Pb/Fe] = +1.88. The relative contributions of the two neutron-capture processes, r- and s- to the observed abundances are examined using a parametric model based analysis, that hints that the neutron-capture elements in HD 209621 primarily originate in s-process.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2010-02-24T07:07:32.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "neutron-capture elements",
      "stellar atmospheric parameters",
      "subaru telescope high dispersion spectrograph",
      "first peak s-process elements",
      "heavy elements"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1111/j.1365-2966.2010.16265.x",
      "journal": "Monthly Notices of the Royal Astronomical Society",
      "year": 2010,
      "month": "May",
      "volume": 404,
      "number": 1,
      "pages": 253
    },
    "note": {
      "typesetting": "TeX",
      "pages": 16,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 846519,
      "adsabs": "2010MNRAS.404..253G"
    }
  }
}