{
  "id": "1603.03260",
  "version": "v1",
  "published": "2016-03-10T13:37:46.000Z",
  "updated": "2016-03-10T13:37:46.000Z",
  "title": "Compatibility of the Large Quasar Groups with the Concordance Cosmological Model",
  "authors": [
    "Gabriel E. Marinello",
    "Roger G. Clowes",
    "Luis E. Campusano",
    "Gerald M. Williger",
    "Ilona K. Söchting",
    "Matthew J. Graham"
  ],
  "comment": "16 pages, 12 figures, Submitted in MNRAS",
  "categories": [
    "astro-ph.CO"
  ],
  "abstract": "We study the compatibility of large quasar groups with the concordance cosmological model. Large Quasar Groups are very large spatial associations of quasars in the cosmic web, with sizes of 50-250h^-1 Mpc. In particular, the largest large quasar group known, named Huge-LQG, has a longest axis of ~860h^-1 Mpc, larger than the scale of homogeneity (~260 Mpc), which has been pointed as a possible violation of the cosmological principle. Using mock catalogues constructed from the Horizon Run 2 cosmological simulation, we found that large quasar groups size, quasar member number and mean overdensity distributions in the mocks agree with observations. The Huge-LQG is found to be a rare group with a probability of 0.3 per cent of finding a group as large or larger than the observed, but an extreme value analysis shows that it is an expected maximum in the sample volume with a probability of 19 per cent of observing a largest quasar group as large or larger than Huge-LQG. The Huge-LQG is expected to be the largest structure in a volume at least 5.3 +- 1 times larger than the one currently studied.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2016-03-10T13:37:46.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "concordance cosmological model",
      "compatibility",
      "largest large quasar group",
      "quasar member number",
      "extreme value analysis"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 16,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2016arXiv160303260M",
      "inspire": 1427000
    }
  }
}