{
  "id": "1209.6614",
  "version": "v1",
  "published": "2012-09-28T19:06:10.000Z",
  "updated": "2012-09-28T19:06:10.000Z",
  "title": "The Sagittarius Stream and Halo Triaxiality",
  "authors": [
    "N. Deg",
    "Lawrence Widrow"
  ],
  "comment": "21 pages, 13 figures, 3 tables, accepted to MNRAS",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "We present a mass model for the Milky Way, which is fit to observations of the Sagittarius stream together with constraints derived from a wide range of photometric and kinematic data. The model comprises a S\\'{e}rsic bulge, an exponential disk, and an Einasto halo. Our Bayesian analysis is accomplished using an affine-invariant Markov chain Monte Carlo algorithm. We find that the best-fit dark matter halo is triaxial with axis ratios of $3.3\\pm 0.7$ and $2.7\\pm 0.4$ and with the short axis approximately aligned with the Sun-Galactic centre line. Our results are consistent with those presented in Law and Majewski (2010). Such a strongly aspherical halo is disfavoured by the standard cold dark matter scenario for structure formation.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2012-09-28T19:06:10.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "sagittarius stream",
      "halo triaxiality",
      "markov chain monte carlo algorithm",
      "standard cold dark matter scenario",
      "affine-invariant markov chain monte carlo"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1093/mnras/sts089",
      "journal": "Monthly Notices of the Royal Astronomical Society",
      "year": 2013,
      "month": "Jan",
      "volume": 428,
      "number": 1,
      "pages": 912
    },
    "note": {
      "typesetting": "TeX",
      "pages": 21,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1188666,
      "adsabs": "2013MNRAS.428..912D"
    }
  }
}