{
  "id": "1510.02475",
  "version": "v1",
  "published": "2015-10-08T20:04:39.000Z",
  "updated": "2015-10-08T20:04:39.000Z",
  "title": "Unveiling a Rich System of Faint Dwarf Galaxies in the Next Generation Fornax Survey",
  "authors": [
    "Roberto P. Munoz",
    "Paul Eigenthaler",
    "Thomas H. Puzia",
    "Matthew A. Taylor",
    "Yasna Ordenes-Briceno",
    "Karla Alamo-Martinez",
    "Karen X. Ribbeck",
    "Simon Angel",
    "Massimo Capaccioli",
    "Patrick Cote",
    "Laura Ferrarese",
    "Gaspar Galaz",
    "Maren Hempel",
    "Michael Hilker",
    "Andres Jordan",
    "Ariane Lancon",
    "Steffen Mieske",
    "Maurizio Paolillo",
    "Tom Richtler",
    "Ruben Sanchez-Janssen",
    "Hongxin Zhang"
  ],
  "comment": "6 pages, 3 figures. Accepted for publication in The Astrophysical Journal Letters. Download the high-resolution version of the paper from the following link: https://www.dropbox.com/s/xb9vz8s29wlzjgf/ms.pdf?dl=0",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "We report the discovery of 158 previously undetected dwarf galaxies in the Fornax cluster central regions using a deep coadded $u, g$ and $i$-band image obtained with the DECam wide-field camera mounted on the 4-meter Blanco telescope at the Cerro Tololo Interamerican Observatory as part of the {\\it Next Generation Fornax Survey} (NGFS). The new dwarf galaxies have quasi-exponential light profiles, effective radii $0.1\\!<\\!r_e\\!<\\!2.8$ kpc and average effective surface brightness values $22.0\\!<\\!\\mu_i\\!<\\!28.0$ mag arcsec$^{-2}$. We confirm the existence of ultra-diffuse galaxies (UDGs) in the Fornax core regions that resemble counterparts recently discovered in the Virgo and Coma galaxy clusters.~We also find extremely low surface brightness NGFS dwarfs, which are several magnitudes fainter than the classical UDGs. The faintest dwarf candidate in our NGFS sample has an absolute magnitude of $M_i\\!=\\!-8.0$\\,mag. The nucleation fraction of the NGFS dwarf galaxy sample appears to decrease as a function of their total luminosity, reaching from a nucleation fraction of $>\\!75\\%$ at luminosities brighter than $M_i\\!\\simeq\\!-15.0$ mag to $0\\%$ at luminosities fainter than $M_i\\!\\simeq\\!-10.0$ mag. The two-point correlation function analysis of the NGFS dwarf sample shows an excess on length scales below $\\sim\\!100$ kpc, pointing to the clustering of dwarf galaxies in the Fornax cluster core.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-10-08T20:04:39.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "generation fornax survey",
      "faint dwarf galaxies",
      "low surface brightness ngfs",
      "surface brightness ngfs dwarfs",
      "rich system"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}