1306.3970 (Sergey Pilipenko et al.)

Testing statistical significance of large quasar groups with sheets model of large scale structure    [PDF]

Sergey Pilipenko, Alexander Malinovsky

We argue that the largest group of quasars (LQG) U1.27 discovered by Clowes et al. (2013), in the SDSS DR7 catalogue does not contradict the hypothesis of Poisson distribution of quasars. We found that random catalogues with the same shape and number of QSOs as the real sample may contain groups which resemble U1.27. By simulating quasar catalogues with embedded model of the large scale structure we also found that the size of LQGs selected by MST and similar methods does not correspond to the scale of homogeneity of the Universe and can be explained by the percolation process.

View original: http://arxiv.org/abs/1306.3970