On possible associations of quasi-stellar objects and radio galaxies with rich clusters of galaxies

Details On possible associations of quasi-stellar objects and radio galaxies with rich clusters of galaxies On possible associations of quasi-stellar objects and radio galaxies with rich clusters of galaxies

Aug 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...216..227r&link_type=abstract

Astrophysical Journal, Part 1, vol. 216, Aug. 15, 1977, p. 227-236. NSF-supported research;

Mathematics

Logic

29

Galactic Clusters, Quasars, Radio Galaxies, Red Shift, Astronomical Catalogs, Astronomical Coordinates, Elliptical Galaxies, Statistical Distributions

Scientific paper

A comparison of the cataloged coordinates of QSOs and of 3CR galaxies with those of Abell's rich clusters of galaxies yields the following results: (1) There is no statistically significant evidence that high-redshift QSOs lie preferentially close to Abell clusters. (2) There is no statistically significant evidence that low-redshift QSOs lie preferentially close to Abell clusters. (3) There is (as is well known) highly significant evidence that 3CR galaxies lie preferentially close to Abell clusters. (4) The distributions of angular separations between QSOs and clusters and between 3CR galaxies and clusters differ at statistically significant (but not highly significant) levels. In view of these results, a generic relationship between low-redshift QSOs and radio galaxies seems questionable. This result for the QSOs is also entirely consistent with the idea that they are 'local' objects with redshifts of noncosmological origin.

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