{
  "id": "1301.2994",
  "version": "v1",
  "published": "2013-01-14T14:54:09.000Z",
  "updated": "2013-01-14T14:54:09.000Z",
  "title": "Fundamental parameters of red giants in 47 Tucanae",
  "authors": [
    "A. O. Thygesen",
    "L. Sbordone"
  ],
  "comment": "4 pages, 4 figures, proceedings of \"Reading the book of globular clusters with the lens of stellar evolution\", Rome, Nov. 26-28, 2012, in Memorie della Societa' Astronomica Italiana Supplementi",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "In these proceedings we present initial results of a spectroscopic analysis of a small sample of evolved K-giants in the globular cluster 47 Tucanae. We derive the effective temperature, surface gravity and microturbulence of all targets using standard methods. Further we derive LTE abundances of [Fe/H] and [O/Fe] as well as the abundance of sodium, using NLTE corrections. We find a mean metallicity for the cluster of [Fe/H]$=-0.75\\pm0.10$, in excellent agreement with several other studies. Also, we confirm the sodium-oxygen anticorrelation previously reported by a number of other authors. Finally, we see indications of the sodium enriched stars also being enriched in heavy magnesium isotopes.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2013-01-14T14:54:09.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "fundamental parameters",
      "red giants",
      "heavy magnesium isotopes",
      "initial results",
      "sodium enriched stars"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1210602,
      "adsabs": "2013MmSAI..84..261T"
    }
  }
}