{
  "id": "1010.2602",
  "version": "v1",
  "published": "2010-10-13T09:00:04.000Z",
  "updated": "2010-10-13T09:00:04.000Z",
  "title": "Dark Matter Halos: The Dynamical Basis of Effective Empirical Models",
  "authors": [
    "A. Lapi",
    "A. Cavaliere"
  ],
  "comment": "11 pages, 2 figures, Accepted by Advances in Astronomy",
  "journal": "Advances in Astronomy, Focus issue on \"Dark Matter\", vol. 2011",
  "categories": [
    "astro-ph.CO",
    "astro-ph.GA"
  ],
  "abstract": "We investigate the dynamical basis of the classic empirical models (specifically, Sersic-Einasto and generalized NFW) that are widely used to describe the distributions of collisionless matter in galaxies. We submit that such a basis is provided by our \\alpha-profiles, shown to constitute solutions of the Jeans dynamical equilibrium with physical boundary conditions. We show how to set the parameters of the empirical in terms of the dynamical models; we find the empirical models, and specifically Sersic-Einasto, to constitute a simple and close approximation to the dynamical models. Finally, we discuss how these provide an useful baseline for assessing the impact of the small-scale dynamics that may modulate the density slope in the central galaxy regions.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2010-10-13T09:00:04.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "dark matter halos",
      "effective empirical models",
      "dynamical basis",
      "dynamical models",
      "central galaxy regions"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1155/2011/903429",
      "journal": "Advances in Astronomy",
      "year": 2011,
      "volume": 2011,
      "pages": 903429
    },
    "note": {
      "typesetting": "TeX",
      "pages": 11,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 872751,
      "adsabs": "2011AdAst2011E...7L"
    }
  }
}