{
  "id": "1201.2884",
  "version": "v1",
  "published": "2012-01-13T16:19:39.000Z",
  "updated": "2012-01-13T16:19:39.000Z",
  "title": "An approach to effective temperature and surface gravity in post-AGB and RV Tauri stars at the near-IR region",
  "authors": [
    "R. E. Molina"
  ],
  "comment": "To be published April 2012. 14 pages, 9 figures, 4 tables",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "A number of empirical correlations that allows us to calculate the effective temperature and surface gravity for a set evolved post-AGB and RV Tauri stars are determined using as calibrators the intrinsic colours of 2MASS (Two Micron All Sky Survey) photometry. We have analyzed a total sample of 36 stars where 25 are post-AGB stars and 11 are RV Tauri stars, respectively. A group of 11 stars with parallaxes measures were used as calibrators of the absolute magnitude. The result for T$_{\\rm eff}$ and log g from intrinsic colours (J-H)$_{0}$ and (H-K$_{s}$)$_{0}$ at the near-infrared pass bands reach a dispersion of 220 K and 0.27, respectively. We can estimate the absolute magnitude using the intrinsic colour in the near-infrared band with an uncertainty of 0.28 mag. This indicates that (J-H)$_{0}$ and (H-K$_{s}$)$_{0}$ show sensitivity to the absolute magnitude.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2012-01-13T16:19:39.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "rv tauri stars",
      "surface gravity",
      "effective temperature",
      "near-ir region",
      "absolute magnitude"
    ],
    "publication": {
      "journal": "Revista Mexicana de Astronomia y Astrofisica",
      "year": 2012,
      "month": "Apr",
      "volume": 48,
      "pages": 95
    },
    "note": {
      "typesetting": "TeX",
      "pages": 14,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1084603,
      "adsabs": "2012RMxAA..48...95M"
    }
  }
}