{
  "id": "1611.00855",
  "version": "v1",
  "published": "2016-11-03T01:18:42.000Z",
  "updated": "2016-11-03T01:18:42.000Z",
  "title": "ALMA band 8 continuum emission from Orion Source I",
  "authors": [
    "Tomoya Hirota",
    "Masahiro N. Machida",
    "Yuko Matsushita",
    "Kazuhito Motogi",
    "Naoko Matsumoto",
    "Mi Kyoung Kim",
    "Ross A. Burns",
    "Mareki Honma"
  ],
  "comment": "5 pages, 2 figures, accepted for publication in the The Astrophysical Journal",
  "categories": [
    "astro-ph.GA",
    "astro-ph.SR"
  ],
  "abstract": "We have measured continuum flux densities of a high-mass protostar candidate, a radio source I in the Orion KL region (Orion Source I) using the Atacama Large Millimeter/Submillimeter Array (ALMA) at band 8 with an angular resolution of 0.1\". The continuum emission at 430, 460, and 490 GHz associated with Source I shows an elongated structure along the northwest-southeast direction perpendicular to the so-called low-velocity bipolar outflow. The deconvolved size of the continuum source, 90 au times 20 au, is consistent with those reported previously at other millimeter/submillimeter wavelength. The flux density can be well fitted to the optically thick black-body spectral energy distribution (SED), and the brightness temperature is evaluated to be 700-800 K. It is much lower than that in the case of proton-electron or H- free-free radiations. Our data are consistent with the latest ALMA results by Plambeck & Wright (2016), in which the continuum emission have been proposed to arise from the edge-on circumstellar disk via thermal dust emission, unless the continuum source consists of an unresolved structure with the smaller beam filling factor.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2016-11-03T01:18:42.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "continuum emission",
      "orion source",
      "alma band",
      "thick black-body spectral energy distribution",
      "optically thick black-body spectral energy"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}