The angular correlation of quasars and Abell clusters

Details The angular correlation of quasars and Abell clusters The angular correlation of quasars and Abell clusters

Feb 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...386...36r&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 386, Feb. 10, 1992, p. 36-41. Research supported by Corning Glass Works.

Statistics

Computation

35

Angular Correlation, Galactic Clusters, Quasars, Astronomical Catalogs, Computational Astrophysics, Radio Astronomy

Scientific paper

Studying the distribution of two large inhomogeneous quasar samples with respect to a statistical sample of Abell clusters, it is found that optically selected high-redshift quasars strongly avoid foreground rich clusters. Radio-selected objects are found to be largely free from such bias. While foreground confusion may cause much of the avoidance, evidence from the radio samples suggests that an appreciable fraction of the effect is due to intervening absorption. A 25-percent-or-greater deficit is found in the optical quasar counts extending typically 60 arcmin from the rich clusters. The absorption component can have substantial effects on observations of objects at cosmological distances.

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