{
  "id": "1009.4688",
  "version": "v2",
  "published": "2010-09-23T19:34:39.000Z",
  "updated": "2010-10-26T16:09:00.000Z",
  "title": "Mn, Cu and Zn abundances in barium stars and their correlations with neutron capture elements",
  "authors": [
    "Dinah M. Allen",
    "Gustavo F. Porto de Mello"
  ],
  "comment": "17 pages, 8 figures, 7 tables; accepted to be published in A&A; in press",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "We present abundances of Mn, Cu, Zn and various light and heavy elements for a sample of barium and normal giant stars, and present correlations between abundances contributed to different degrees by the weak-s, main-s, and r-processes of neutron capture, between Fe-peak elements and heavy elements. Data from the literature are also considered in order to better study the abundance pattern of peculiar stars. The stellar spectra were observed with FEROS/ESO, and the stellar atmospheric parameters of the 8 barium giant stars and 6 normal giants analyzed by us lie in the range 4300 < T_eff/K < 5300, -0.7 < [Fe/H] <= 0.12 and 1.5 <= log g < 2.9. Carbon and nitrogen abundances were derived by the spectral synthesis of molecular bands of C_2, CH and CN. For all the other elements, atomic lines were used to perform the spectral synthesis. A very large scatter was found when data from the literature were considered, mainly for the Mn abundances. We found that [Zn/Fe] correlates well with the heavy element excesses, its abundance clearly increasing as the heavy element excesses increase, a trend not shown by the [Cu/Fe] and [Mn/Fe] ratios. Also, the excess of Mn, Cu and Zn relative to heavy elements usually show an increasing trend toward higher metallicities. Our results suggest that a larger fraction of the synthesis of Zn is owed to massive stars than is the case of Cu, and that the contribution of the main-s process to the synthesis of both elements is small. We also conclude that Mn is mostly synthesized by SN Ia, and that a non-negligible fraction of the synthesis of Mn, Cu and Zn is owed to the weak s-process.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2010-10-26T16:09:00.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "neutron capture elements",
      "barium stars",
      "zn abundances",
      "correlations",
      "normal giant"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1051/0004-6361/200912356",
      "journal": "Astronomy and Astrophysics",
      "year": 2011,
      "month": "Jan",
      "volume": 525
    },
    "note": {
      "typesetting": "TeX",
      "pages": 17,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 870812,
      "adsabs": "2011A&A...525A..63A"
    }
  }
}