{
  "id": "1111.2366",
  "version": "v1",
  "published": "2011-11-09T23:40:32.000Z",
  "updated": "2011-11-09T23:40:32.000Z",
  "title": "The Cosmic Web, Multi-Stream Flows, and Tessellations",
  "authors": [
    "Sergei Shandarin",
    "Salman Habib",
    "Katrin Heitmann"
  ],
  "comment": "15 pages, 14 figures",
  "categories": [
    "astro-ph.CO"
  ],
  "abstract": "Understanding the structure of the matter distribution in the Universe due to the action of the gravitational instability -- the cosmic web -- is complicated by lack of direct analytic access to the nonlinear domain of structure formation. Here, we suggest and apply a novel tessellation method designed for cold dark matter (CDM) N-body cosmological simulations. The method is based on the fact that the initial CDM state can be described by a 3-D manifold (in a 6-D phase space) that remains continuous under evolution. Our technique uses the full phase space information and has no free parameters; it can be used to compute multi-stream and density fields, the main focus of this paper. Using a large-box LCDM simulation we carry out a variety of initial analyses with the technique. These include studying the correlation between multi-streaming and density, the identification of structures such as Zel'dovich pancakes and voids, and statistical measurements of quantities such as the volume fraction as a function of the number of streams -- where we find a remarkable scaling relation. Cosmological implications are briefly discussed.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2011-11-09T23:40:32.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "98.65.-r",
      "98.80.-k",
      "98.65.Dx",
      "98.80.Bp"
    ],
    "keywords": [
      "cosmic web",
      "multi-stream flows",
      "full phase space information",
      "novel tessellation method",
      "large-box lcdm simulation"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1103/PhysRevD.85.083005",
      "journal": "Physical Review D",
      "year": 2012,
      "month": "Apr",
      "volume": 85,
      "number": 8,
      "pages": "083005"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 15,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 945375,
      "adsabs": "2012PhRvD..85h3005S"
    }
  }
}