{
  "id": "1311.4988",
  "version": "v1",
  "published": "2013-11-20T09:31:48.000Z",
  "updated": "2013-11-20T09:31:48.000Z",
  "title": "TERZAN 5: the remnant of a pristine fragment of the Galactic Bulge?",
  "authors": [
    "Barbara Lanzoni",
    "the Cosmic-Lab Team"
  ],
  "comment": "Proceeding of the EWASS 2013 Conference, S5: \"Local group, local cosmology\" (8-9 July 2013, Turku, Finland), Mem. S.A.It, M. Monelli and S. Salvadori Eds",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "Terzan 5 is a stellar system in the Galactic bulge commonly catalogued as a globular cluster. Through dedicated NIR photometry and spectroscopy we have discovered that it harbors two main stellar populations defining two distinct red clumps (RCs) in the colour-magnitude diagram, and displaying different iron content: [Fe/H] = -0.2 and [Fe/H]=+0.3 for the faint and the bright red clumps, respectively. In addition, a third minor population with significantly lower metallicity ([Fe/H]=-0.79) has been recently detected, thus enlarging the metallicity range covered by Terzan 5 to Delta[Fe/H] ~ 1 dex. This evidence demonstrates that, similarly to omega Centauri in the Galactic halo, Terzan 5 is not a genuine globular cluster, but a stellar system that experienced a much more complex star formation and chemical enrichment history. Moreover the striking chemical similarity with the bulge stars suggests that Terzan 5 could be the relic of one of the massive clumps that contributed through strong dynamical interactions with other similar sub-structures) to the formation of the Galactic bulge.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2013-11-20T09:31:48.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "galactic bulge",
      "pristine fragment",
      "stellar system",
      "third minor population",
      "genuine globular cluster"
    ],
    "tags": [
      "conference paper"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2014MmSAI..85..536L"
    }
  }
}