Triplets of quasars as lighthouses of rich galaxy clusters
In this Letter, we investigate the very large-scale environments of cluster-scale triplets of type 1 Seyfert galaxies, lower luminosity counterparts of quasars, detected at z < 0.2 in the fourth Data Release of the Sloan Digital Sky Survey. The search for cluster scale triplets (object-object...
| Hauptverfasser: | , , , , |
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| Format: | Journal article |
| Sprache: | English |
| Veröffentlicht: |
2008
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