{
  "id": "1002.0551",
  "version": "v3",
  "published": "2010-02-02T20:55:55.000Z",
  "updated": "2010-05-24T07:26:33.000Z",
  "title": "Probing the Galaxy's bars via the Hercules stream",
  "authors": [
    "Esko Gardner",
    "Chris Flynn"
  ],
  "comment": "9 pages, 10 figures, Accepted to MNRAS, Corrected for errata",
  "doi": "10.1111/j.1365-2966.2010.16470.x",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "It has been suggested that a resonance between a rotating bar and stars in the solar neighbourhood can produce the so called 'Hercules stream'. Recently, a second bar may have been identified in the Galactic centre, the so called 'long bar', which is longer and much flatter than the traditional Galactic bar, and has a similar mass. We looked at the dynamical effects of both bars, separately and together, on orbits of stars integrated backwards from local position and velocities, and a model of the Galactic potential which includes the bars directly. Both bars can produce Hercules like features, and allow us to measure the rotation rate of the bar(s). We measure a pattern speed, for both bars, of 1.87 +/- 0.02 times the local circular frequency. This is on par with previous measurements for the Galactic bar, although we do adopt a slightly different Solar motion. Finally, we identify a new kinematic feature in local velocity space, caused by the long bar, which is tempting to identify with the high velocity 'Arcturus' stream.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2010-05-24T07:26:33.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "hercules stream",
      "galaxys bars",
      "long bar",
      "high velocity arcturus",
      "local velocity space"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "Wiley-Blackwell",
      "journal": "Monthly Notices of the Royal Astronomical Society",
      "year": 2010,
      "month": "Jun",
      "volume": 405,
      "number": 1,
      "pages": 545
    },
    "note": {
      "typesetting": "TeX",
      "pages": 9,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 844462,
      "adsabs": "2010MNRAS.405..545G"
    }
  }
}