{
  "id": "1502.03109",
  "version": "v1",
  "published": "2015-02-10T21:00:27.000Z",
  "updated": "2015-02-10T21:00:27.000Z",
  "title": "Radio Continuum Observations of the Galactic Center: Photoevaporative Proplyd-like Objects near Sgr A*",
  "authors": [
    "F. Yusef-Zadeh",
    "D. A. Roberts",
    "M. Wardle",
    "W. Cotton",
    "R. Schödel",
    "M. J. Royster"
  ],
  "comment": "13 pages, 4 figures, ApJL (in press)",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "We present radio images within 30$''$ of Sgr A* based on recent VLA observations at 34 GHz with 7.8 microJy sensitivity and resolution $\\sim88\\times46$ milliarcseconds (mas). We report 44 partially resolved compact sources clustered in two regions in the E arm of ionized gas that orbits Sgr A*. These sources have size scales ranging between ~50 and 200 mas (400 to 1600 AUs), and a bow-shock appearance facing the direction of Sgr A*. Unlike the bow-shock sources previously identified in the near-IR but associated with massive stars, these 34 GHz sources do not appear to have near-IR counterparts at 3.8 $\\mu$m. We interpret these sources as a candidate population of photoevaporative protoplanetary disks (proplyds) that are associated with newly formed low mass stars with mass loss rates ~10^{-7} - 10^{-6} solar mass per year and are located at the edge of a molecular cloud outlined by ionized gas. The disks are externally illuminated by strong Lyman continuum radiation from the ~100 OB and WR massive stars distributed within 10'' of Sgr A*. The presence of proplyds implies current in-situ star formation activity near Sgr A* and opens a window for the first time to study low mass star, planetary and brown dwarf formations near a supermassive black hole.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-02-10T21:00:27.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "radio continuum observations",
      "photoevaporative proplyd-like objects",
      "in-situ star formation activity",
      "implies current in-situ star",
      "galactic center"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 13,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}