{
  "id": "1407.7858",
  "version": "v2",
  "published": "2014-07-29T20:00:04.000Z",
  "updated": "2015-01-07T17:19:26.000Z",
  "title": "Reproducing the Kinematics of Damped Lyman-alpha Systems",
  "authors": [
    "Simeon Bird",
    "Martin Haehnelt",
    "Marcel Neeleman",
    "Shy Genel",
    "Mark Vogelsberger",
    "Lars Hernquist"
  ],
  "comment": "14 pages, 13 figures, minor changes to match version accepted by MNRAS",
  "journal": "Monthly Notices of the Royal Astronomical Society 2015 447 (4): 1834-1846",
  "doi": "10.1093/mnras/stu2542",
  "categories": [
    "astro-ph.GA",
    "astro-ph.CO"
  ],
  "abstract": "We examine the kinematic structure of Damped Lyman-alpha Systems (DLAs) in a series of cosmological hydrodynamic simulations using the AREPO code. We are able to match the distribution of velocity widths of associated low ionisation metal absorbers substantially better than earlier work. Our simulations produce a population of DLAs dominated by halos with virial velocities around 70 km/s, consistent with a picture of relatively small, faint objects. In addition, we reproduce the observed correlation between velocity width and metallicity and the equivalent width distribution of SiII. Some discrepancies of moderate statistical significance remain; too many of our spectra show absorption concentrated at the edge of the profile and there are slight differences in the exact shape of the velocity width distribution. We show that the improvement over previous work is mostly due to our strong feedback from star formation and our detailed modelling of the metal ionisation state.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2014-07-29T20:00:04.000Z",
      "comment": "14 pages, 13 figures, submitted to MNRAS",
      "journal": null,
      "doi": null
    },
    {
      "version": "v2",
      "updated": "2015-01-07T17:19:26.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "damped lyman-alpha systems",
      "velocity width",
      "width distribution",
      "ionisation metal absorbers substantially better",
      "associated low ionisation metal absorbers"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "journal": "Monthly Notices of the Royal Astronomical Society",
      "year": 2015,
      "month": "Feb",
      "volume": 447,
      "number": 2,
      "pages": 1834
    },
    "note": {
      "typesetting": "TeX",
      "pages": 14,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1308876,
      "adsabs": "2015MNRAS.447.1834B"
    }
  }
}