2002MNRAS.331..569S

Query : 2002MNRAS.331..569S

2002MNRAS.331..569S - Mon. Not. R. Astron. Soc., 331, 569-577 (2002/April-2)

Quasar environment in the context of large-scale structure at z ∼0.3.

SOCHTING I.K., CLOWES R.G. and CAMPUSANO L.E.

Abstract (from CDS):

We look at quasar environment in the context of large-scale structure (LSS) - a new approach, giving a more informed interpretation of quasar-galaxy correlations. This paper presents our first results for a sample of z ∼0.3 quasars. We use Voronoi tessellation applied in colour (BJ-R) slices for the detection of galaxy clusters and the minimal spanning tree (MST) to delineate the large-scale structure. This new cluster detection method allows us to find reliably galaxy clusters at z <0.3 from SuperCOSMOS measurements of UK Schmidt Telescope plates. By reconstructing the large-scale structure in a relatively narrow redshift band (0.2<z <0.3), we show that quasars follow the large-scale structure traced by galaxy clusters. None of the quasars in our radio-quiet sample is located in the central area of a galaxy cluster. Two quasars, found in a very rich environment, are actually located between two very close galaxy clusters, consistent with results on z ∼1 quasars, suggesting that cluster mergers may be involved in one of the quasar formation mechanisms.

Abstract Copyright: 2002 Blackwell Science Ltd

Journal keyword(s): methods: miscellaneous - galaxies: clusters: general - quasars: general - large-scale structure of Universe

Nomenclature: Table 1: [SCC2002] JHHMMSS.s+DDMMSS N=8. Table 2: [SCC2002] JHHMM.m+DDMM N=72.

Simbad objects: 85

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Number of rows : 85
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 [SCC2002] J1031.3+0516 ClG 10 31.3 +05 16           ~ 1 0
2 [SCC2002] J1031.5+0346 ClG 10 31.5 +03 46           ~ 1 0
3 [SCC2002] J1032.1+0426 ClG 10 32.1 +04 26           ~ 1 0
4 [SCC2002] J1032.4+0459 ClG 10 32.4 +04 59           ~ 1 0
5 [SCC2002] J1032.5+0242 ClG 10 32.5 +02 42           ~ 1 0
6 [SCC2002] J1032.8+0236 ClG 10 32.8 +02 36           ~ 1 0
7 [SCC2002] J1033.0+0212 ClG 10 33.0 +02 12           ~ 1 0
8 [SCC2002] J1033.0+0559 ClG 10 33.0 +05 59           ~ 1 0
9 [SCC2002] J1033.3+0512 ClG 10 33.3 +05 12           ~ 1 0
10 [SCC2002] J1033.4+0501 ClG 10 33.4 +05 01           ~ 1 0
11 [SCC2002] J1033.9+0423 ClG 10 33.9 +04 23           ~ 1 0
12 SDSS J103356.86+054829.7 QSO 10 33 56.8598855592 +05 48 29.847747888   19.71 19.38     ~ 18 0
13 [SCC2002] J1034.1+0539 ClG 10 34.1 +05 39           ~ 1 0
14 [SCC2002] J1034.7+0426 ClG 10 34.7 +04 26           ~ 1 0
15 [SCC2002] J1034.7+0611 ClG 10 34.7 +06 11           ~ 1 0
16 [VV2000] J103447.9+051617 Sy1 10 34 47.9599457304 +05 16 16.916635596   18.57 18.23     ~ 6 0
17 SDSS J103458.35+055231.8 QSO 10 34 58.3564043376 +05 52 31.866241764   18.89 18.72     ~ 21 0
18 [SCC2002] J1035.0+0439 ClG 10 35.0 +04 39           ~ 1 0
19 [SCC2002] J1035.1+0334 ClG 10 35.1 +03 34           ~ 1 0
20 2MASS J10350607+0601419 Sy1 10 35 06.0862946736 +06 01 41.613983544   18.82 18.47     ~ 20 0
21 [SCC2002] J1035.3+0355 ClG 10 35.3 +03 55           ~ 1 0
22 [SCC2002] J1035.3+0403 ClG 10 35.3 +04 03           ~ 1 0
23 [SCC2002] J1035.4+0559 ClG 10 35.4 +05 59           ~ 1 0
24 [SCC2002] J1035.5+0518 ClG 10 35.5 +05 18           ~ 1 0
25 [SCC2002] J1036.2+0250 ClG 10 36.2 +02 50           ~ 1 0
26 2MASS J10361564+0319172 Sy1 10 36 15.6736006440 +03 19 16.735807668   18.79 18.60     ~ 26 0
27 [SCC2002] J1036.3+0311 ClG 10 36.3 +03 11           ~ 1 0
28 [SCC2002] J1036.3+0721 ClG 10 36.3 +07 21           ~ 1 0
29 QSO B1033+051 QSO 10 36 26.3339911392 +04 54 36.500878836   17.6 18.54 17.8   ~ 27 0
30 [SCC2002] J1036.6+0622 ClG 10 36.6 +06 22           ~ 1 0
31 [SCC2002] J1036.7+0713 ClG 10 36.7 +07 13           ~ 1 0
32 [SCC2002] J1037.5+0546 ClG 10 37.5 +05 46           ~ 1 0
33 [SCC2002] J1037.6+0407 ClG 10 37.6 +04 07           ~ 1 0
34 [SCC2002] J1038.3+0453 ClG 10 38.3 +04 53           ~ 1 0
35 2MASS J10382825+0445355 Sy1 10 38 28.2051342096 +04 45 35.458712172   19.17 18.83     ~ 19 0
36 [SCC2002] J1038.5+0459 ClG 10 38.5 +04 59           ~ 1 0
37 2MASS J10383119+0609118 QSO 10 38 31.1767967760 +06 09 12.173667264           ~ 1 0
38 [SCC2002] J1038.6+0509 ClG 10 38.6 +05 09           ~ 1 0
39 [SCC2002] J1038.9+0441 ClG 10 38.9 +04 41           ~ 1 0
40 2MASS J10385793+0448389 QSO 10 38 57.9432620688 +04 48 38.922095376   19.21 18.87     ~ 17 0
41 [SCC2002] J1039.1+0412 ClG 10 39.1 +04 12           ~ 1 0
42 [SCC2002] J1039.1+0513 ClG 10 39.1 +05 13           ~ 1 0
43 SDSS-C4-DR3 1100 ClG 10 39 24.20 +02 19 22.3           ~ 5 0
44 [SCC2002] J1039.6+0239 ClG 10 39.6 +02 39           ~ 1 0
45 [SCC2002] J1039.7+0347 ClG 10 39.7 +03 47           ~ 1 0
46 [SCC2002] J1039.9+0403 ClG 10 39.9 +04 03           ~ 1 0
47 [SCC2002] J1040.1+0342 ClG 10 40.1 +03 42           ~ 1 0
48 [SCC2002] J1040.5+0319 ClG 10 40.5 +03 19           ~ 1 0
49 [SCC2002] J1040.6+0424 ClG 10 40.6 +04 24           ~ 1 0
50 [SCC2002] J1040.7+0650 ClG 10 40.7 +06 50           ~ 1 0
51 [SCC2002] J1040.9+0458 ClG 10 40.9 +04 58           ~ 1 0
52 [SCC2002] J1041.8+0235 ClG 10 41.8 +02 35           ~ 1 0
53 [SCC2002] J1042.2+0724 ClG 10 42.2 +07 24           ~ 1 0
54 [SCC2002] J1043.2+0340 ClG 10 43.2 +03 40           ~ 1 0
55 [SCC2002] J1043.8+0412 ClG 10 43.8 +04 12           ~ 1 0
56 [SCC2002] J1044.0+0435 ClG 10 44.0 +04 35           ~ 1 0
57 [SCC2002] J1044.0+0705 ClG 10 44.0 +07 05           ~ 1 0
58 QSO B1041+035 QSO 10 44 06.3835903320 +03 14 51.033112656           ~ 6 0
59 [SCC2002] J1044.5+0525 ClG 10 44.5 +05 25           ~ 1 0
60 [SCC2002] J1044.5+0544 ClG 10 44.5 +05 44           ~ 1 0
61 [SCC2002] J1044.5+0605 ClG 10 44.5 +06 05           ~ 1 0
62 2MASS J10445187+0352521 Sy1 10 44 51.8773585560 +03 52 51.943491480   18.58 18.14     ~ 27 0
63 SDSS J104504.83+043401.3 Sy1 10 45 04.8348379392 +04 34 01.308584748   19.43 19.17     ~ 18 0
64 SDSS J104535.08+034123.1 Sy1 10 45 35.0799020112 +03 41 23.152276428   19.35 19.07     ~ 15 0
65 [SCC2002] J1045.6+0418 ClG 10 45.6 +04 18           ~ 1 0
66 [SCC2002] J1046.0+0640 ClG 10 46.0 +06 40           ~ 1 0
67 2MASS J10461058+0350311 QSO 10 46 10.6040417304 +03 50 31.255164708   19.74 19.32     ~ 20 0
68 [SCC2002] J1046.6+0304 ClG 10 46.6 +03 04           ~ 1 0
69 [SCC2002] J1047.9+0505 ClG 10 47.9 +05 05           ~ 1 0
70 [SCC2002] J1048.0+0440 ClG 10 48.0 +04 40           ~ 1 0
71 [SCC2002] J1048.4+0616 ClG 10 48.4 +06 16           ~ 1 0
72 [SCC2002] J1048.9+0713 ClG 10 48.9 +07 13           ~ 1 0
73 [SCC2002] J1048.9+0723 ClG 10 48.9 +07 23           ~ 1 0
74 [SCC2002] J1049.0+0550 ClG 10 49.0 +05 50           ~ 1 0
75 [SCC2002] J1049.3+0510 ClG 10 49.3 +05 10           ~ 1 0
76 [SCC2002] J1049.4+0340 ClG 10 49.4 +03 40           ~ 1 0
77 [SCC2002] J1049.4+0554 ClG 10 49.4 +05 54           ~ 1 0
78 [SCC2002] J1050.0+0525 ClG 10 50.0 +05 25           ~ 1 0
79 [SCC2002] J1050.1+0338 ClG 10 50.1 +03 38           ~ 1 0
80 [SCC2002] J1050.5+0444 ClG 10 50.5 +04 44           ~ 1 0
81 SDSS J105042.74+041740.8 QSO 10 50 42.7470074736 +04 17 40.827045444   20.23 19.64     ~ 9 0
82 [SCC2002] J1051.3+0341 ClG 10 51.3 +03 41           ~ 1 0
83 [SCC2002] J1051.3+0506 ClG 10 51.3 +05 06           ~ 1 0
84 [SCC2002] J1051.7+0518 ClG 10 51.7 +05 18           ~ 1 0
85 [SCC2002] J1051.9+0458 ClG 10 51.9 +04 58           ~ 1 0

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