The alignment of distant radio sources

Details The alignment of distant radio sources The alignment of distant radio sources

Feb 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985natur.313..463k&link_type=abstract

Nature (ISSN 0028-0836), vol. 313, Feb. 7, 1985, p. 463-465.

Other

8

Alignment, Confidence Limits, Extragalactic Radio Sources, Spatial Distribution, Astrometry, Cosmology, Gravitational Lenses, Quasars, Red Shift, Universe

Scientific paper

The relative orientation of the axes of extragalactic extended radio sources was first investigated by Willson, who noted that in the 3CR sample there was a tendency for the axes to lie parallel to each other for sources separated by ⪉10° on the sky. Using two larger samples, Sanders has recently concluded that this tendency to align is present at a high confidence level (>3σ) only for distant (z > 0.4) sources. The authors have attempted to verify the effect using two more independent and larger source samples and find no significant tendency for axis alignment. They also investigated a sample formed by adding well-observed radio quasars to 3CR sources and found that, even in this sample, the effect shows up only at a marginally significant level (<2σ).

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