{
  "id": "0908.4281",
  "version": "v1",
  "published": "2009-08-28T20:20:09.000Z",
  "updated": "2009-08-28T20:20:09.000Z",
  "title": "Averaging in cosmological models using scalars",
  "authors": [
    "A. A. Coley"
  ],
  "comment": "33 pages",
  "journal": "Class.Quant.Grav.27:245017,2010",
  "doi": "10.1088/0264-9381/27/24/245017",
  "categories": [
    "gr-qc",
    "astro-ph.CO"
  ],
  "abstract": "The averaging problem in cosmology is of considerable importance for the correct interpretation of cosmological data. A rigorous mathematical definition of averaging in a cosmological model is necessary. In general, a spacetime is completely characterized by its scalar curvature invariants, and this suggests a particular spacetime averaging scheme based entirely on scalars. We clearly identify the problems of averaging in a cosmological model. We then present a precise definition of a cosmological model, and based upon this definition, we propose an averaging scheme in terms of scalar curvature invariants. This scheme is illustrated in a simple static spherically symmetric perfect fluid cosmological spacetime, where the averaging scales are clearly identified.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2009-08-28T20:20:09.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "cosmological model",
      "perfect fluid cosmological spacetime",
      "symmetric perfect fluid cosmological",
      "scalar curvature invariants",
      "static spherically symmetric perfect fluid"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "IOP",
      "journal": "Classical and Quantum Gravity",
      "year": 2010,
      "month": "Dec",
      "volume": 27,
      "number": 24,
      "pages": 245017
    },
    "note": {
      "typesetting": "TeX",
      "pages": 33,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 829778,
      "adsabs": "2010CQGra..27x5017C"
    }
  }
}