{
  "id": "1610.08610",
  "version": "v1",
  "published": "2016-10-27T04:13:04.000Z",
  "updated": "2016-10-27T04:13:04.000Z",
  "title": "The physical environment around IRAS 17599-2148: infrared dark cloud and bipolar nebula",
  "authors": [
    "L. K. Dewangan",
    "D. K. Ojha",
    "I. Zinchenko",
    "P. Janardhan",
    "S. K. Ghosh",
    "A. Luna"
  ],
  "comment": "18 pages, 10 figures, 1 table, Accepted for publication in The Astrophysical Journal",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "We present a multi-scale and multi-wavelength study to investigate the star formation process around IRAS 17599$-$2148 that is part of an elongated filamentary structure (EFS) (extension $\\sim$21 pc) seen in the {\\it Herschel} maps. Using the {\\it Herschel} data analysis, at least six massive clumps (M$_{clump}$ $\\sim$777 -- 7024 M$_{\\odot}$) are found in the EFS with a range of temperature and column density of $\\sim$16--39~K and $\\sim$0.6--11~$\\times$~10$^{22}$ cm$^{-2}$ (A$_{V}$ $\\sim$7--117 mag), respectively. The EFS hosts cold gas regions (i.e. infrared dark cloud) without any radio detection and a bipolar nebula (BN) linked with the H\\,{\\sc ii} region IRAS 17599$-$2148, tracing two distinct environments inferred through the temperature distribution and ionized emission. Based on virial analysis and higher values of self-gravitating pressure, the clumps are found unstable against gravitational collapse. We find 474 young stellar objects (YSOs) in the selected region and $\\sim$72\\% of these YSOs are found in the clusters distributed mainly toward the clumps in the EFS. These YSOs might have spontaneously formed due to processes not related to the expanding H\\,{\\sc ii} region. At the edges of BN, four additional clumps are also associated with YSOs clusters, which appear to be influenced by the expanding H\\,{\\sc ii} region. The most massive clump in the EFS contains two compact radio sources traced in the GMRT 1.28 GHz map and a massive protostar candidate, IRS~1 prior to an ultracompact H\\,{\\sc ii} phase. Using the VLT/NACO near-infrared images, IRS~1 is resolved with a jet-like feature within a 4200~AU scale.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2016-10-27T04:13:04.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "infrared dark cloud",
      "bipolar nebula",
      "physical environment",
      "efs hosts cold gas regions",
      "compact radio sources"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 18,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}