The double radio source 3C 343.1: A galaxy-QSO pair with very different redshifts

• Published in: Astronomy and astrophysics (Berlin) Vol. 414; no. 3; pp. L37 - L40
• Main Authors: Arp, H., Burbidge, E. M., Burbidge, G.
• Format: Journal Article
• Language: English
• Published: Les Ulis EDP Sciences 01.02.2004
• Subjects: Astronomy; Earth, ocean, space; Exact sciences and technology; galaxies: active; galaxies: individual: 3C 343.1; Quasars; Quasars. Active or peculiar galaxies, objects, and systems; quasars: general; radio continuum: general; Radio galaxies; Stellar systems. Galactic and extragalactic objects and systems. The universe; Continuum; Active galaxies; Quasars; Radio map; Red shift; quasars: general; galaxies: active; Optical properties; galaxies: individual: 3C 343.1; Galaxy quasar association; radio continuum: general; Double radiosource
• ISSN: 0004-6361; 1432-0746
• DOI: 10.1051/0004-6361:20031745

The strong radio source 3C 343.1 consists of a galaxy and a QSO separated by no more than about $0.25^{\prime\prime}$. The chance of this being an accidental superposition is conservatively ~$1\times10^{-8}$. The $z=0.344$ galaxy is connected to the $z=0.750$ QSO by a radio bridge. The numerical relation between the two redshifts is that predicted from previous associations. This pair is an extreme example of many similar physical associations of QSOs and galaxies with very different redshifts.