SIMBAD references

2016MNRAS.461.2267M - Mon. Not. R. Astron. Soc., 461, 2267-2281 (2016/September-3)

Compatibility of the large quasar groups with the concordance cosmological model.


Abstract (from CDS):

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 50-250 h–1 Mpc. In particular, the largest large quasar group known, named Huge-LQG, has a longest axis of ∼860 h–1 Mpc, larger than the scale of homogeneity (∼260 Mpc), which has been noted 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.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): quasars: general - cosmology: observations - large-scale structure of Universe - large-scale structure of Universe

Simbad objects: 2

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