Mathematics – Logic
Scientific paper
Aug 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...247..762o&link_type=abstract
Astrophysical Journal, Part 1, vol. 247, Aug. 1, 1981, p. 762-773.
Mathematics
Logic
106
Cosmology, Galactic Clusters, Quasars, Computer Techniques, Red Shift, Spatial Distribution, Statistical Analysis, Statistical Correlation
Scientific paper
The spatial distribution of redshift 2 quasars on scales of 100-3000 Mpc are studied. Visual inspection of the CTIO quasars in pictorial formats shows a number of close groups and pairs with small delta z in the 4 m survey. Three statistical methods are applied to the data: binning analysis, the nearest neighbor test, and the correlation function. After modification for the cosmological, edge, and selection effects in the samples, the techniques indicate no evidence for clustering or other deviation from randomness on the 100-3000 Mpc scale. The 2 sigma upper limit on deviation is about 80% of the expected value of the correlation function, which is consistent with expectations for galaxy clustering. An increase in sensitivity to clustering on the 100 Mpc scale relative to the original 4 m survey can be achieved by using a square or rectangular field distribution and a larger area.
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