2008MNRAS.386L..57S


Query : 2008MNRAS.386L..57S

2008MNRAS.386L..57S - Mon. Not. R. Astron. Soc., 386, L57-L61 (2008/May-1)

Triplets of quasars as lighthouses of rich galaxy clusters.

SOCHTING I.K., COLDWELL G.V., ALONSO M.V., SMITH M.G. and LAMBAS D.G.

Abstract (from CDS):

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 separations <2.0h–1Mpc and <2000km/s) in a combined sample of Seyferts and quasars resulted in only 7 triplets, 3 of which are at z < 0.2. We investigated their environments and found a strong association of z < 0.2 triplets with the richest central parts of superclusters. In two out of three cases, the members of the triplets have been found on the periphery of an extremelly rich galaxy cluster (Abell class 2 and 3). The third triplet also appears associated with a very rich cluster of galaxies but on a somewhat larger scale. Nevertheless, on a small scale, it is still associated with a cluster but of lesser richness. These results suggest that triplets of type 1 Seyfert galaxies at low redshifts are excellent tracers of very rich clusters. Following these results we conclude that triplets of quasars, bright counterparts of type 1 Seyfert galaxies, may be the most successful means of finding distant, very rich, galaxy clusters.

Abstract Copyright: ©2008 The Authors. Journal compilation © 2008 RAS

Journal keyword(s): galaxies: clusters: general - galaxies: Seyfert - large-scale structure of Universe

Simbad objects: 14

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Number of rows : 14
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 [RGD2013] J082050.48+472047.58 Sy1 08 20 50.4789403632 +47 20 47.515738416   19.37 18.83     ~ 16 0
2 3C 197.1 BLL 08 21 33.6000545232 +47 02 37.303572516   18.08 17.33     ~ 134 1
3 LEDA 2292300 Sy1 08 22 09.5474078928 +47 05 52.883414808   19.54 18.77     ~ 24 1
4 ACO 646 ClG 08 22 10.0 +47 05 58           ~ 99 1
5 ACO 655 ClG 08 25 30.3 +47 07 48           ~ 103 0
6 2MASS J15290992+3931097 Sy1 15 29 09.9545811648 +39 31 09.618137544   19.77 19.31     ~ 9 0
7 2MASS J15301791+3922516 Sy1 15 30 17.9351915760 +39 22 51.548271168   19.71 19.23     ~ 8 0
8 2MASS J15304379+3904356 Sy1 15 30 43.7928639144 +39 04 35.658703128   19.70 19.12     ~ 8 0
9 ACO 2100 ClG 15 36 37.4 +37 38 45           ~ 27 0
10 2MASX J16195129+4058472 Sy1 16 19 51.3112866864 +40 58 47.331025212   17.81 17.34     ~ 60 0
11 LEDA 57861 Sy1 16 20 12.7588873152 +40 09 06.181684380   17.19 16.74     ~ 32 0
12 Mrk 699 Sy1 16 23 45.8806648032 +41 04 56.429671836   17.04 16.61     ~ 117 0
13 ACO 2197 ClG 16 28 10.4 +40 54 26           ~ 283 0
14 ACO 2199 ClG 16 28 37.0 +39 31 28           ~ 1143 1

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2023.01.30-05:58:14

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