The clustering of quasars from an objectiveprism survey
Abstract
The positions and redshifts of 108 quasars from the Cerro Tololo objectiveprism survey are subjected to Fourier Power Spectrum Analysis in a search for clustering in their spatial distribution. It is found that, on the whole, these quasars are not clustered but are scattered in space independently at random. The sole exception is a group of four quasars at z = 0.37 which has a low probability of being a chance event and which, with a size of about 100 Mpc, may therefore be the largest known structure in the Universe. The conclusions disagree with Arp's analysis of this catalogue: his 'clouds of quasars' ejected by certain lowredshift galaxies, for example, are attributable to sensitivity variations among the different plates of the survey. It is shown that analysis of deeper surveys is likely to show up quasar clusters even at high redshift, and could therefore provide a useful new cosmological probe.
 Publication:

Monthly Notices of the Royal Astronomical Society
 Pub Date:
 May 1982
 DOI:
 10.1093/mnras/199.3.683
 Bibcode:
 1982MNRAS.199..683W
 Keywords:

 Quasars;
 Red Shift;
 Spatial Distribution;
 Star Clusters;
 Astronomical Coordinates;
 Density Distribution;
 Fourier Transformation;
 Power Spectra;
 Prisms;
 Statistical Analysis;
 Astronomy