{
  "id": "1110.4313",
  "version": "v1",
  "published": "2011-10-19T15:43:35.000Z",
  "updated": "2011-10-19T15:43:35.000Z",
  "title": "Trigonometric Parallaxes of Massive Star-Forming Regions. IX. The Outer Arm in the First Quadrant",
  "authors": [
    "A. Sanna",
    "M. J. Reid",
    "T. M. Dame",
    "K. M. Menten",
    "A. Brunthaler",
    "L. Moscadelli",
    "X. W. Zheng",
    "Y. Xu"
  ],
  "comment": "19 pages, 5 figures, 4 tables, accepted by The Astrophysical Journal",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "We report a trigonometric parallax measurement with the Very Long Baseline Array for the water maser in the distant high-mass star-forming region G75.30+1.32. This source has a heliocentric distance of 9.25+-0.45 kpc, which places it in the Outer arm in the first Galactic quadrant. It lies 200 pc above the Galactic plane and is associated with a substantial HI enhancement at the border of a large molecular cloud. At a Galactocentric radius of 10.7 kpc, G75.30+1.32 is in a region of the Galaxy where the disk is significantly warped toward the North Galactic Pole. While the star-forming region has an instantaneous Galactic orbit that is nearly circular, it displays a significant motion of 18 km/s toward the Galactic plane. The present results, when combined with two previous maser studies in the Outer arm, yield a pitch angle of about 12 degrees for a large section of the arm extending from the first quadrant to the third.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2011-10-19T15:43:35.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "outer arm",
      "first quadrant",
      "massive star-forming regions",
      "trigonometric parallaxes",
      "galactic plane"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1088/0004-637X/745/1/82",
      "journal": "The Astrophysical Journal",
      "year": 2012,
      "month": "Jan",
      "volume": 745,
      "number": 1,
      "pages": 82
    },
    "note": {
      "typesetting": "TeX",
      "pages": 19,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 940548,
      "adsabs": "2012ApJ...745...82S"
    }
  }
}