{
"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. SÃ¶chting",
"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
}
}
}