{
  "id": "1708.07431",
  "version": "v1",
  "published": "2017-08-24T14:13:33.000Z",
  "updated": "2017-08-24T14:13:33.000Z",
  "title": "SMA Observations of the Hot Molecular Core IRAS 18566+0408",
  "authors": [
    "Andrea Silva",
    "Qizhou Zhang",
    "Patricio Sanhueza",
    "Xing Lu",
    "Maria T. Beltran",
    "Cassandra Fallscheer",
    "Henrik Beuther",
    "T. K. Sridharan",
    "Riccardo Cesaroni"
  ],
  "comment": "14 pages, 10 figures, Accepted for publication in ApJ",
  "categories": [
    "astro-ph.GA",
    "astro-ph.SR"
  ],
  "abstract": "We present Submillimeter Array (SMA) observations toward the high-mass star-forming region IRAS 18566+0408. Observations at 1.3 mm continuum and in several molecular line transitions were performed in the compact (2.\"4 angular resolution) and very-extended (~0.\"4 angular resolution) configurations. The continuum emission from the compact configuration shows a dust core of 150 Msun, while the very-extended configuration reveals a dense (2.6 x 10^7 cm^-3) and compact (~4,000 AU) condensation of 8 Msun. We detect 31 molecular transitions from 14 species including CO isotopologues, SO, CH3OH, OCS, and CH3CN. Using the different k-ladders of the CH3CN line, we derive a rotational temperature at the location of the continuum peak of 240 K. The 12CO(2-1), 13CO(2-1), and SO(6_5-5_4) lines reveal a molecular outflow at PA ~135^o centered at the continuum peak. The extended 12CO(2-1) emission has been recovered with the IRAM 30 m telescope observations. Using the combined data set, we derive an outflow mass of 16.8 Msun. The chemically rich spectrum and the high rotational temperature confirm that IRAS 18566+0408 is harboring a hot molecular core. We find no clear velocity gradient that could suggest the presence of a rotational disk-like structure, even at the high resolution observations obtained with the very-extended configuration.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2017-08-24T14:13:33.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "hot molecular core iras",
      "sma observations",
      "continuum peak",
      "high rotational temperature confirm",
      "angular resolution"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 14,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}