1996/01/09 by G. R. Burbidge, G. Burbidge, Burbidge, G. +5
Physics and Astronomy · #Astro and Planetary Science #Astronomical and nuclear sciences #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9601031
8 pages, including 1 figure, submitted to Astronomy and Astrophysics Letters
arxiv created 1996/01/09 · arxiv updated 2009/12/01
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.