{
  "id": "1810.06326",
  "version": "v1",
  "published": "2018-10-15T12:59:14.000Z",
  "updated": "2018-10-15T12:59:14.000Z",
  "title": "Stellar and dark matter density in the Local Universe",
  "authors": [
    "I. D. Karachentsev",
    "K. N. Telikova"
  ],
  "comment": "11 pages, 8 figures, 4 tables, accepted by AN",
  "categories": [
    "astro-ph.GA",
    "astro-ph.CO"
  ],
  "abstract": "We calculate the mean density profiles for luminous and dark matter on distance scales $D \\sim(1 - 100)$ Mpc around us using recent all-sky catalogs of galaxy groups. Within the Local Volume $( D < 11 ~\\rm Mpc)$ we derived the mean stellar density $\\Omega_*= 0.44\\%$ in the critical density units and the mean total matter density $\\Omega_m = 0.17$. In the sphere with a radius of 40 Mpc these quantities drop to $\\Omega_* = 0.24 - 0.32\\%$ and $\\Omega_m = 0.09 - 0.14$. In a larger volume within $D\\sim135$ Mpc the discussed densities become more uncertain: $\\Omega_* = 0.20 - 0.24\\%$ and $\\Omega_m = 0.05 - 0.16$. We summarize that the major part of the cosmic dark matter locates outside the virial and collapsing zones of groups and clusters.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-10-15T12:59:14.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "dark matter density",
      "local universe",
      "cosmic dark matter locates outside",
      "mean total matter density",
      "mean density profiles"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 11,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}