{
  "id": "1006.5152",
  "version": "v1",
  "published": "2010-06-26T16:51:34.000Z",
  "updated": "2010-06-26T16:51:34.000Z",
  "title": "Galactic Parameters from Masers with Trigonometric Parallaxes",
  "authors": [
    "Vadim Bobylev",
    "Anisa Bajkova"
  ],
  "comment": "8 pages, 1table, 9 figures, accepted",
  "journal": "MNRAS, 2010",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "Spatial velocities of all currently known 28 masers having trigonometric parallaxes, proper motion and line-of-site velocities are reanalyzed using Bottlinger's equations. These masers are associated with 25 active star-forming regions and are located in the range of galactocentric distances 3<R<14 kpc. To determine the Galactic rotation parameters, we used the first three Taylor expansion terms of angular rotation velocity {\\Omega} at the galactocentric distance of the Sun R0=8 kpc. We obtained the following solutions: {\\Omega}o=-31.0 +/- 1.2 km/s/kpc, {\\Omega}o'=4.46 +/- 0.21 km/s/kpc^2, {\\Omega}o\"=-0.876 +/- 0.067 km/s/kpc^3, Oort constants: A=17.8 +/- 0.8 km/s/kpc, B=-13.2 +/- 1.5 km/s/kpc and circular velocity of the Solar neighborhood rotation Vo=248 +/- 14 km/s. Fourier analysis of galactocentric radial velocities of masers VR allowed us to estimate the wavelength {\\lambda}=2.0 +/- 0.2 kpc and peak velocity f_R=6.5 +/- 2 km/s of periodic perturbations from the density wave and velocity of the perturbations 4 +/- 1 km/s near the location of the Sun. Phase of the Sun in the density wave is estimated as {\\chi}o ~ -130^o +/- 10^o. Taking into account perturbations evoked by spiral density wave we obtained the following non-perturbed components of the peculiar Solar velocity with respect to the local standard of rest (LSR) (Uo,Vo,Wo)LSR=(5.5,11,8.5) +/- (2.2,1.7,1.2) km/s.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2010-06-26T16:51:34.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "trigonometric parallaxes",
      "galactic parameters",
      "galactocentric distance",
      "peculiar solar velocity",
      "galactic rotation parameters"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1111/j.1365-2966.2010.17244.x",
      "journal": "Monthly Notices of the Royal Astronomical Society",
      "year": 2010,
      "month": "Nov",
      "volume": 408,
      "number": 3,
      "pages": 1788
    },
    "note": {
      "typesetting": "TeX",
      "pages": 8,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 859711,
      "adsabs": "2010MNRAS.408.1788B"
    }
  }
}