Very close pairs of Quasi-Stellar Objects

Details Very close pairs of Quasi-Stellar Objects Very close pairs of Quasi-Stellar Objects

1996-01-09

arxiv.org/abs/astro-ph/9601031v1

Astronomy and Astrophysics

Astrophysics

8 pages, including 1 figure, submitted to Astronomy and Astrophysics Letters

Scientific paper

It is pointed out that there are now known four very close pairs of QSOs with separations < 5 arcsec and very different redshifts. Several estimates of the probability that they are accidental configurations range between 10^{-7} and 3.5 x 10^{-3}. We conclude either that this is further evidence that QSOs have significant non-cosmological redshift components, or that thave significant non-cosmological redshift components, or that the pairs must be explained by gravitational lensing.

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