{
  "id": "1707.02310",
  "version": "v1",
  "published": "1970-01-01T00:00:00.000Z",
  "updated": "2017-07-07T18:00:35.000Z",
  "title": "Carbon-enhanced metal-poor stars in the SDSS-APOGEE database",
  "authors": [
    "Collin L. Kielty",
    "Kim A. Venn",
    "Nicholas B. Loewen",
    "Matthew D. Shetrone",
    "Vinicius M. Placco",
    "Farbod Jahandar",
    "Szabolcs Mészáros",
    "Sarah L. Martell"
  ],
  "comment": "20 pages, 9 tables, 9 figures: Accepted for publication in MNRAS",
  "doi": "10.1093/mnras/stx1594",
  "categories": [
    "astro-ph.GA",
    "astro-ph.SR"
  ],
  "abstract": "We identify six new CEMP stars ([C/Fe]>+0.7 and [Fe/H]< -1.8) and another seven likely candidates within the APOGEE database following Data Release 12. These stars have chemical compositions typical of metal-poor halo stars, e.g., mean [$\\alpha$/Fe] = +0.24$\\pm$0.24, based on the ASPCAP pipeline results. A lack of heavy element spectral lines impedes further sub-classification of these CEMP stars, however, based on radial velocity scatter, we predict most are not CEMP-s stars which are typically found in binary systems. Only one object, 2M15312547+4220551, may be in a binary since it exhibits a scatter in its radial velocity of 1.7 $\\pm$0.6 km s$^{-1}$ based on three visits over a 25.98 day baseline. Optical observations are now necessary to confirm the stellar parameters and low metallicities of these stars, to determine the heavy-element abundance ratios and improve the precision in the derived abundances, and to examine their CEMP sub-classifications.",
  "revisions": [
    {
      "version": "v0",
      "updated": "1970-01-01T00:00:00.000Z",
      "title": "",
      "abstract": "",
      "comment": null,
      "journal": null,
      "doi": null,
      "authors": []
    },
    {
      "version": "v1",
      "updated": "2017-07-07T18:00:35.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "carbon-enhanced metal-poor stars",
      "sdss-apogee database",
      "heavy element spectral lines impedes",
      "cemp stars",
      "aspcap pipeline results"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 20,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}