Group of quasars (Clowes+, 1991)

Details Group of quasars (Clowes+, 1991) Group of quasars (Clowes+, 1991)

Feb 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995ycat..72490218c&link_type=abstract

VizieR On-line Data Catalog: J/MNRAS/249/218. Originally published in: 1991MNRAS.249..218C

Physics

Qsos, Redshifts

Scientific paper

We have found evidence for a large, elongated group of at least ten quasars with largest dimension ~100-200h-1Mpc at z~1.3, in the direction of ESO/SERC field 927, which has the field centre (1950) 10h40m00s, 05deg00'00". There are probably further members that have not yet been observed. The morphology of the group seems to be like a clump, but there might be some sub-grouping on scales ~20h-1Mpc. The group is similar in size and number of quasars to that found by Crampton, Cowley & Hartwick (1989). The fact that two such groups are now known is evidence that the distribution of quasars is not so simple as was previously thought: at large scales (>10h-1Mpc) the majority of quasars may be distributed uniformly and at random, but rare, large groups also occur. The groups may be large physical structures, but a strong association with the large structures of galaxies seems doubtful. (2 data files).

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