The clustering of radio galaxies

Details The clustering of radio galaxies The clustering of radio galaxies

Feb 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...385l..33b&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 385, Feb. 1, 1992, p. L33-L36.

Astronomy and Astrophysics

Astronomy

22

Galactic Clusters, Galactic Evolution, Radio Astronomy, Radio Galaxies, Correlation, Red Shift, Universe

Scientific paper

The origin of the clustering of radio galaxies is investigated and the average richness of the radio-galaxy parent groups are determined for different subsamples of radio power, morphology, and redshift. The radio-galaxy correlations are found to agree well with the richness-dependent cluster correlation function when the average richness of the parent-groups is used. It is suggested that the radio-galaxy clustering arises from their preferential location in galaxy groups. The radio galaxies then trace the same large-scale structure exhibited by their parent groups. At a redshift of about 0.5, the high-power radio galaxies appear to inhabit a much richer, by a factor of about 3, environment than at a redshift of about 0. The 0.5-redshift F-R II galaxies are argued to be good tracers of large-scale structure at high redshifts.

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