{
  "id": "1806.10149",
  "version": "v1",
  "published": "2018-06-26T18:00:08.000Z",
  "updated": "2018-06-26T18:00:08.000Z",
  "title": "Lessons on the high-z Universe from local Laboratories: Extreme Environments in Blueberry Galaxies",
  "authors": [
    "Yu Rong",
    "Huan Yang",
    "Hong-xin Zhang",
    "Thomas H. Puzia",
    "Igor V. Chilingarian",
    "Paul Eigenthaler",
    "Sangeeta Malhotra",
    "James E. Rhoads",
    "Junxian Wang",
    "Yasna Ordens-briceno",
    "Evelyn Johnston"
  ],
  "comment": "10 pages, 7 figures, 1 table; submitted to ApJ",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "A population of so-called \"blueberry\" dwarf galaxies with extremely blue colors, low-metallicities, and enormous ionization ratios, has recently been found by \\cite{Yang17}. As a pilot study of these blueberries, we investigate two new blueberry candidates, RGG\\,B and RGG\\,5, which have Hubble Space Telescope high-resolution images.~We find that RGG\\,B and RGG\\,5 are likely to be merging dwarf galaxies; RGG\\,B may have a close merging companion, and RGG\\,5 presents shell-like outskirts.~Yet the current evidence still cannot exclude the possibility that RGG~B is just disturbed by in-situ star formation through, e.g., outflows, rather than undergoing a merger.~All of the blueberries, including RGG\\,B and RGG\\,5, are located close to the theoretical maximum-starburst-line in the BPT diagram, have very high ionization parameters, and relatively low hardness ionizing radiation fields, exhibit nitrogen overabundances, and show extremely red mid-IR colors, and reside in the so-called \"ULIRGs/LINERs/Obscured AGN\" region.~Their specific star formation rates (sSFR) range among the most extreme and compare with those of extreme starbursts at high redshifts.~The blueberry galaxies may not harbor AGN, which may be due to their very early phases of the galaxy merging process.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-06-26T18:00:08.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "blueberry galaxies",
      "extreme environments",
      "high-z universe",
      "local laboratories",
      "specific star formation rates"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 10,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}