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Title:
Superclustering at high redshifts
Authors:
West, Michael J.
Affiliation:
AA(Canadian Institute for Theoretical Astrophysics, Toronto, Canada)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 379, Sept. 20, 1991, p. 19-36. Research supported by NSERC. (ApJ Homepage)
Publication Date:
09/1991
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Extragalactic Radio Sources, Galactic Clusters, Galactic Evolution, Quasars, Red Shift, Alignment, Cosmology, Radio Emission
DOI:
10.1086/170481
Bibliographic Code:
1991ApJ...379...19W

Abstract

An argument is presented to the effect that the radio emission from distant quasars and radio galaxies is not randomly directed, but rather has preferred orientations with respect to surrounding large-scale structures. In particular, the radio major axes of high-redshift sources are found to exhibit a significant tendency to point in the direction of neighboring quasars and radio galaxies for separations of up to about 45/h Mpc (comoving). This alignment phenomenon is very similar to that seen at low redshifts between neighboring rich clusters and their brightest member galaxies, which suggests that what is being observed here is tentative evidence of the existence of a filamentary pattern of superclustering at redshifts of about 1 or more. It is concluded that if the alignment effect found here is confirmed with larger and more homogeneous samples, then the orientations of extragalactic radio sources may provide a very useful probe of large-scale structure at high redshifts.

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