{
  "id": "astro-ph/9906049",
  "version": "v1",
  "published": "1999-06-02T20:30:47.000Z",
  "updated": "1999-06-02T20:30:47.000Z",
  "title": "Evidence for universal structure in galactic halos",
  "authors": [
    "William H. Kinney",
    "Pierre Sikivie"
  ],
  "comment": "4 pages, LaTeX, 1 epsf figure",
  "journal": "Phys.Rev. D61 (2000) 087305",
  "doi": "10.1103/PhysRevD.61.087305",
  "categories": [
    "astro-ph"
  ],
  "abstract": "The late infall of dark matter onto a galaxy produces structure (such as caustics) in the distribution of dark matter in the halo. We argue that such structure is likely to occur generically on length scales proportional to $l \\sim t_0 v_{rot}$, where $t_0$ is the age of the universe and $v_{rot}$ is the rotation velocity of the galaxy. A set of 32 extended galactic rotation curves is analyzed. For each curve, the radial coordinate is rescaled according to $r\\to \\tilde r \\equiv r (v_0 / v_{rot})$, where we choose $v_0 = 220 km/s$. A linear fit to each rescaled rotation curve is subtracted, and the residuals are binned and averaged. The sample shows significant features near $\\tilde r = 40 kpc$ and $\\tilde r = 20 kpc$. This is consistent with the predictions of the self-similar caustic ring model of galactic halos.",
  "revisions": [
    {
      "version": "v1",
      "updated": "1999-06-02T20:30:47.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "galactic halos",
      "universal structure",
      "dark matter",
      "extended galactic rotation curves",
      "galaxy produces structure"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. D"
    },
    "note": {
      "typesetting": "LaTeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 501046
    }
  }
}