Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aj.....95..644a&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 95, March 1988, p. 644-650.
Astronomy and Astrophysics
Astronomy
20
Astronomical Catalogs, Galactic Clusters, Galactic Structure, Quasars, Red Shift, Algorithms, Cosmology, Fourier Transformation, Galactic Evolution
Scientific paper
The scrambling method for measuring correlation functions in inhomogeneous samples is applied to a field of 146 quasars in Sculptor. No clustering is found, the 3σ upper limit on the amplitude of the quasar-quasar correlation function on a scale of 40 Mpc being 4.6 times that for current-epoch galaxies at the same separation. The method is extended and applied to the Véron catalog of approximately 3000 quasars. The quasar-quasar correlation function on a scale of 9 Mpc in the redshift intervals 0.3 ≤ z < 2.5 and 0.3 ≤ z < 1.4 is found to be, respectively, 0.88±0.42 and 2.6±1.1 times that among galaxies locally. In both redshift ranges the clustering is due to a small number of pairs at low redshift, which makes estimates based on the Véron catalog highly susceptible to systematic errors. A more reliable estimate for 1.4 ≤ z < 2.5 indicates a lack of clustering in that range. The sample sizes needed for an accurate measurement of clustering below z = 1.5 are estimated.
Anderson Nels
Kunth Daniel
Sargent Wallace L. W.
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