{
  "id": "2009.11834",
  "version": "v1",
  "published": "2020-09-24T17:32:22.000Z",
  "updated": "2020-09-24T17:32:22.000Z",
  "title": "Fundamental parameters for 45 open clusters with Gaia DR2, an improved extinction correction and a metallicity gradient prior",
  "authors": [
    "H. Monteiro",
    "W. S. Dias",
    "A. Moitinho",
    "T. Cantat-Gaudin",
    "J. R. D. Lépine",
    "G.",
    "Carraro",
    "E. Paunzen"
  ],
  "comment": "19 pages, accepted for publication in MNRAS",
  "categories": [
    "astro-ph.SR",
    "astro-ph.GA",
    "astro-ph.IM"
  ],
  "abstract": "Reliable fundamental parameters of open clusters such as distance, age and extinction are key to our understanding of Galactic structure and stellar evolution. In this work we use {\\it Gaia} DR2 to investigate 45 open clusters listed in the \\emph{New catalogue of optically visible open clusters and candidates} (DAML) but with no previous astrometric membership estimation based on {\\it Gaia} DR2. In the process of selecting targets for this study we found that some clusters reported as new discoveries in recent papers based on {\\it Gaia} DR2 were already known clusters listed in DAML. Cluster memberships were determined using a maximum likelihood method applied to {\\it Gaia} DR2 astrometry. This has allowed us to estimate mean proper motions and mean parallaxes for all investigated clusters. Mean radial velocities were also determined for 12 clusters, 7 of which had no previous published values. We have improved our isochrone fitting code to account for interstellar extinction using an updated extinction polynomial for the {\\it Gaia} DR2 photometric band-passes and the Galactic abundance gradient as a prior for metallicity. The updated procedure was validated with a sample of clusters with high quality $[Fe/H]$ determinations. We then did a critical review of the literature and verified that our cluster parameter determinations represent a substantial improvement over previous values.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2020-09-24T17:32:22.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "open clusters",
      "metallicity gradient prior",
      "fundamental parameters",
      "gaia dr2",
      "extinction correction"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 19,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}